What causes a fuel gauge to read full?

Fuel gauge stuck on full Another, less common, symptom of an issue with the fuel gauge sender is a fuel gauge that is stuck on full. A faulty fuel gauge resistor can send a bad signal to the instrument cluster which can cause the gauge to permanently read full.

When do you need to replace the fuel gauge sender?

If your fuel gauge behaves erratically or is stuck on full or empty, you may need to replace the fuel gauge sender. 1. Fuel gauge behaves erratically 2. Fuel gauge stuck on empty 3. Fuel gauge stuck on full The fuel gauge sender is a component that is found in the gas tank of most road going vehicles.

What should I do if my fuel gauge does not sweep?

If it does not, the issue is with the fuel gauge directly. However, if the fuel gauge needle does its sweep as it is supposed to, you need to perform further tests to properly diagnose the problem. The next step after performing the cluster test is to check the fuses.

Why does my gas gauge keep pegging full?

The gas gauge might interpret voltage feedback from a dead sender as FULL or EMPTY, consequently pegging the gauge no matter the actual fuel level. Circuit Problems can cause the gas gauge to stop functioning normally.

Where is the fuel gauge sender located in a car?

The fuel gauge sender is a component that is found in the gas tank of most road going vehicles. The fuel gauge sender, also commonly referred to as the fuel sending unit, is the component responsible for sending the signal that operates the fuel level gauge in the instrument cluster.

What should I do if my gas gauge is not working?

Note that some self-test steps may stop the gas gauge at 1/4, 1/2, and 3/4, as well. Fuel sender test. The fuel sender test should be conducted when the tank is lower than HALF, to prevent fuel splashing. Start by making sure the plug is clean, dry, and free of corrosion. Make sure the pins are straight and that the connector is fully seated.

What to do if your gas gauge reads lower than it should?

When the gauge reads lower than it should, check at the gauge by disconnecting the wiring from the tank unit. Turn the ignition on and if the needle reads full or above, the gauge unit is probably good and the tank unit or the wiring leading to it are probably the problem. Reconnect the tank unit wire to the gauge before proceeding.

What causes a bad gas gauge on a Chevy truck?

A poor ground or loose connection to a gas gauge is just as likely to cause problems as loose or dirty battery cables assuredly will with your starting system.

How to fix Ford p0460 erratic fuel gauge?

Ford Quick Tips #77: DTC P0460 P0463 Erratic Fuel Gauge Quick Fix! – YouTube Ford Quick Tips #77: DTC P0460 P0463 Erratic Fuel Gauge Quick Fix! If playback doesn’t begin shortly, try restarting your device.

What causes the gas gauge needle to move?

The variations in the amount of fuel in the tank cause the arm to move. This changes the resistance of the tank unit, changing the amount of current at the gauge unit coils, which in turn moves the needle located between the coils.

What happens to the fuel gauge when the tank is full?

As the water rises, the float arm rises until it shuts off the fill valve when full. In a fuel tank, as the fuel level rises, the fuel sending unit float rises, and a variable resistor changes the resistance in the electrical current running to the gauge so it reads full.

What should I do if my fuel gauge is low?

If voltage is good, the gauge is faulty. You can order a factory replacement or upgrade with a high-quality aftermarket replacement gauge. If voltage is low, complete the rest of the diagnosis to discover if it is a wiring issue. If all of the above checks out, the issue is likely corroded wiring or a grounding issue.

Where is the fuel gauge on a Chevy Camaro?

On the other hand, gaining access to the fuel sending unit on a third-generation Chevy Camaro requires you to drop the gas tank, while the fuel gauge is easily accessed after removing eight screws. Start with whichever is easier on your vehicle. To test the fuel sending unit, you will need to fill the tank with gas.

How do you reset the fuel gauge on a car?

If this happens, reset your fuel gauge. Each make and model of car has its own specific instructions on how to reset the fuel gauge, but the process is basically the same. Turn the ignition switch to the “On” position. Press the “Odo/Trip” button until the odometer is put into “ODO” mode. Turn off the ignition.

What to do if your fuel gauge is full?

If you DO have 12 volts to the fuel gauge, the next step is to remove the fuel sending unit wire, and, with the ignition key “on”, ground the sender wire to a good chassis ground. The fuel gauge should immediately go to empty. Removing the sending unit wire from the chassis ground the fuel gauge should go directly to “full”.

What would cause a fuel gauge to peg way past full?

Re: What would cause a fuel gauge to peg way past full? Generally, if your gauge is reading past full and the tank isn’t full, it’s the positive wire that has a connection problem. If it’s reading totally empty, it’s the ground. If your tank if full of gas right now; I’d drive it for a while and see what happens.

What are the parts of a gas gauge?

The gas gauge system can be broken down into three basic parts: gauge, sender, and circuit. A fault in one or more of these parts will lead to gas gauge failure. The sending unit is usually part of the Fuel Pump Module : a combination of parts that includes the fuel pump, fuel strainer, fuel filter, and fuel float.

Why is your fuel gauge always stuck on full?

Another, less common, symptom of an issue with the fuel gauge sender is a fuel gauge that is stuck on full. A faulty fuel gauge resistor can send a bad signal to the instrument cluster which can cause the gauge to permanently read full. This is an issue, as the driver needs to know the accurate fuel level of the vehicle as to not run out of fuel.

Why does my fuel gauge stays on full?

Again, a faulty fuel sending unit can cause the fuel meter assembly to malfunction and become stuck on full. A mechanical failure inside the instrument cluster can also cause the gauge to remain stuck on full, if it is a mechanical gauge style meter with a needle.

How do I read the fuel gauge?

Reading Your Oil or Gas Tank Level Go to your tank. If you heat with oil, your tank is most likely in your basement. Find your tank gauge. A tank gauge is either a small glass cylinder or dial on the top or side of the tank. Read your tank gauge. The gauge will show a small marker to indicate how full your tank is.

Can a bad fuel gauge sender send a bad signal?

What does it mean when gauges in your car stop working?

But when the gauges in your car stop working, it’s not a situation you can safely ignore. When one gauge stops working, the problem may be in the gauge itself or a bad sensor, while all the gauges cutting out at the same time often indicates a blown fuse or a defective instrument cluster.

Why does the odometer go blank at night?

The same issue Traverse 2012, during the day in bright sunlight it goes almost blank, but in the night or shade it i ok, also sometimes when I smack above the dash it works for sometime and then goes back dark Just took our 2015 Traverse in for the same issue. They said it is the cluster and need to replace the entire instrument panel.

Why is the odometer on my GM Truck not working?

A common fault on ’99 – ’02 GM trucks was the permanent or intermittent failing of the odometer/gear select LCD. This meant that you were unable to see what gear you were currently in, unable to determine the mileage of the vehicle, and unable to use the trip computer.

What happens when the gas gauge goes blank?

Upon starting the vehicle or when the vehicle is in motion, this gauge will suddenly flash and then go completely blank. After a few minutes, the gauge returns to normal. When the gauge is blank I do not know how much gas I have in the car, the mileage of the vehicle, oil life, etc.

How do you repair an odometer on a car?

Lining up the pins of the stepper motors with their corresponding sockets on the PCB, push the board back onto the instrument cluster. Put pressure on the back of where the stepper motors are (see photo). Replace the back plastic cover of the instrument cluster, ensuring all clips are secured.

How to repair the odometer on a Chevy Avalanche?

In this Instructable, I will show you how to repair odometer/gear select (PRND321) LCD on your GM truck. In this case, mine is a ’02 Chevrolet Avalanche but this should apply to all GMT 800 series trucks within this age range. A common fault on ’99 – ’02 GM trucks was the permanent or intermittent failing of the odometer/gear select LCD.

Why is the gas gauge on my Dodge Charger not working?

I have a 08 Dodge Charger that is having gas gauge issues. Both fuel pumps have been replaced with the sender units. They said if the gauge calibration doesn’t reset it to the proper reading the problem lies in fuel pump number two, (not sure which is which) or the instrument cluster itself.

Why does my gas gauge go to zero?

· The problem evolved and the gauge would randomly drop straight to zero and the gas light would come on. This happened every time the car was operated. It was only a matter of time. This was then accompanied by a check engine light. · Both fuel pumps were replaced (warranty) in case one of them was bad.

What should the voltage be on a fuel gauge?

It should be receiving 12 volts. If voltage is good, the gauge is faulty. You can order a factory replacement or upgrade with a high-quality aftermarket replacement gauge. If voltage is low, complete the rest of the diagnosis to discover if it is a wiring issue.

What does the speedometer and fuel gauge tell you?

Speedometer: The speedometer gives information about the speed at which the car is moving. Fuel Gauge: The fuel gauge indicates the amount of fuel left in the car and how far it is from an empty tank or a full tank. Tachometer: This describes the rotation rate of the crankshaft in the engine.

What should I know about the temperature gauge in my car?

The temperature gauge is an important tool in your vehicle that shows the temperature of your engine’s coolant. Contact YourMechanic and have your car inspected for overheating if it reads too high, as this can cause serious problems. The most popular service booked by readers of this article is Car is overheating Inspection.

What is wrong when the milage indicator starts?

An expert that has 1 follower. Re: What is wrong when the milage indicator starts to…

What do I do if my gas gauge is not working?

In most cases, to gain access to the fuel tank sending unit mount / fuel pump mounting hole, you’ll need to drop the gas tank down. Be sure to do this when there is either minimal gas in the vehicle, or it’s been siphoned out.

Why does my gas gauge read full after a fill up?

When your fuel level is full, the electrical resistance at the sender changes, sends the signal to the gauge, and this is what causes the gauge to read as full after a fill-up. Depending on the level of electrical resistance, the fuel gauge changes to reflect the level of gas in the tank.

How does the fuel gauge work in a car?

The fuel gauge in your automobile indicates the amount of fuel that remains in the gas tank. Some fuel gauges have an analog display while others have a digital or liquid crystal display. Electronic and software malfunctions may cause the fuel gauge in your automobile to inaccurately measure or display the amount of fuel remaining in the gas tank.

What happens when you press the gas pedal?

35 people found this helpful. it does not sputter or misfire but there is delay in taking the pick up when gas paddle is pushed a little hard. The car dies down and then starts taking motion/pick. There does not seem to b problem with transmission. 168 people found this helpful.

How does the sender float on a fuel gauge work?

The sender float is designed to float on the surface of the fuel inside of the tank. As the level drops, the position of the arm and float will shift and move a resistor which controls the display on the gauge.

What happens when you press the gas on a Mercedes?

It seems the car is misfiring the engine is under load, like when you are trying to accelerate. It bogs down as it misfires, then picks up after awhile ( you might not detect it as a misfire just a delay from when you step on the gas to when the car starts to move).

What happens when your gas gauge is not working?

The gas gauge tells you how much fuel is in your gas tank and alerts you when it’s time to refuel. If your gas gauge is not working, the inaccurate information it provides may cause you to run out of gas unexpectedly.

How does the resistance of a gas gauge change?

The fuel float contacts run on a potentiometer, or variable resistor, whose resistance changes depending on float level, effecting a change in output voltage. Some systems are wired so that high fuel level contacts the low-resistance section, gradually increasing resistance as fuel level drops.

What are the symptoms of a bad fuel gauge sender?

Usually a bad or failing fuel gauge sender will produce a few symptoms that can alert the driver of a potential issue. 1. Fuel gauge behaves erratically One of the first symptoms of a problem with the fuel gauge sender is a fuel gauge that behaves erratically.

What does a gas gauge tell you about a car?

Benjamin Jerew is an ASE-certified Master Automobile Technician with over a decade of experience in auto repair, maintenance, and diagnosis. The gas gauge tells you how much fuel is in your gas tank and alerts you when it’s time to refuel.

Which is a symptom of a fuel pump problem?

Another symptom of a problem with the fuel pump is engine performance issues. As the fuel pump is what supplies the vehicle with the fuel required for combustion to occur, any issues with it can affect the engine’s fuel supply and cause issues.

Why does fuel gauge read wrong after fuel pump replaced?

Fuel gauge reads wrong after fuel pump replaced – YouTube If you have a 96 or 97 year gm truck that needs a fuel pump, be sure to order it by the VIN. There is an option for a anti-slosh module that could cause you If you have a 96 or 97 year gm truck that needs a fuel pump, be sure to order it by the VIN.

How can you tell if your fuel pump is dead?

Of course, there could be other explanations for your engine’s failure to start besides a failed fuel pump. To confirm that your pump has failed, check the pressure in your fuel lines with a fuel pressure gauge; if it reads zero, then your pump is likely dead.

What is resistance to ground on universal fuel sender?

When the fuel sender is in the full position the rheostat is creating 90 ohms of resistance to ground. Because the gauge is reading a resistance to ground having proper grounding of the sending unit is essential to get an accurate reading on your fuel gauge. How do I test my fuel sender?

Where is the 5V limit on the fuel gauge?

The only way to test the gauge itself is to hook it up with a 5V input on one post and a known resistance on the other post, 9.6 ohms, FULL, 23 ohms, 1/2 tank, 73 ohms, Empty… The 5V voltage limiter on our Chargers is located in the fuel gauge.

What kind of fuel gauge does a GM car have?

GM cars from the 1930s to the 1960s operate on a 30 ohm scale. At zero ohms in the sender, the float is on the bottom of the tank and the gauge should read empty. At 30 ohms, the float is at the top of its travel and the gauge should read full.

What should fuel gauge read at zero ohms?

At zero ohms in the sender, the float is on the bottom of the tank and the gauge should read empty. At 30 ohms, the float is at the top of its travel and the gauge should read full.

What do you need to know about fuel gauges?

In an old-school classic with analog gauges, you’ll need to know how the gauge works, as manufacturers used different electrical conductance to operate the gauge. For example, a Ford fuel sending unit has almost zero resistance on a full tank, while a GM sending unit of the same year has maximum resistance on a full tank.

What happens if you reset your fuel gauge?

Electronic and software malfunctions may cause the fuel gauge in your automobile to inaccurately measure or display the amount of fuel remaining in the gas tank. If this happens, reset your fuel gauge. Each make and model of car has its own specific instructions on how to reset the fuel gauge, but the process is basically the same. Step 1

How do you test the fuel sending unit?

To test the fuel sending unit, you will need to fill the tank with gas. Use a multimeter to test resistance. In an old-school classic with analog gauges, you’ll need to know how the gauge works, as manufacturers used different electrical conductance to operate the gauge.

Can you mix and match different fuel gauges?

MeterMatch allows you to mix and match different gauges and senders, or to make gauges more accurate. This is great if you have a car that is already drivable, as you will not need to remove or change anything to make the gauge work correctly.

What should I do if my gas gauge is reading 5 V?

Check the owner’s manual for the correct procedure. Fuel sender test. Conduct the test when the tank is lower than half to avoid splashing hot oil. Use the multimeter to check for voltage on the pins, and it has to be 5 V or 12 V on one pin. Gas gauge test.

Why does my gas tank gauge not move?

If the dash gauge now reeds empty, the gas tank unit is defective. If the dash gauge needle fails t move, the dash gauge is defective. If the gas gauge works, but reads lower than it should, check for defective wiring between the gas gauge and the tank sending unit.

When to call a mechanic for a bad gas pedal sensor?

If any of these symptoms occur or your car isn’t responding accurately when you press the gas pedal, you should pull over immediately and call a mechanic. Here is a more detailed list of the most common symptoms of a bad accelerator pedal position sensor.

What happens when you press the gas pedal all the way?

I tried to press the gas pedal all the way, but there is no changes in RPM or acceleration. I had the filters replaced. It would sometimes run normally if I release the gas pedal and press it again. What could be the problem?

When do you do the fuel sender test?

The fuel sender test should be conducted when the tank is lower than HALF, to prevent fuel splashing. Start by making sure the plug is clean, dry, and free of corrosion. Make sure the pins are straight and that the connector is fully seated. Remove the fuel pump module so you can manipulate the float arm.

Why does my fuel gauge read full at all times?

Gauge Reads Full At All Times. If the fuel gauge reads full at all times, the probable causes are: • The wire between the sender and gauge is broken and/or the connections are not good. • The resistance wire in the sender is broken. • The sender is not grounded and/or the tank is not grounded to the chassis.

At zero ohms in the sender, the float is on the bottom of the tank and the gauge should read empty. At 30 ohms, the float is at the top of its travel and the gauge should read full.

What does the fuel gauge read on a MG GT?

My Smiths fuel gauge reads 3/4 when the fuel tank is full on my MG B GT. I have changed the tank sender unit, the voltage stabilizer and now the fuel gauge but it still reads 3/4 when full. Any help appreciated. Ground the contact at the sender unit. With ign on the guage should read full. If it does then the wiring is OK.

How can I check the fuel gauge on my Boat?

With the screws or bolts out, you can pull up on the sender, removing it from the tank. Testing the Fuel Sender and Tank Ground. After removing the fuel sender, let’s check it before putting in a new one. Connect a meter to the two wires on the sender. With the meter in the continuity feature, slowly run the float from the bottom towards the top.

How do you read a gas gauge?

Recognize that each dial represents a number in a 4- to 5- digit reading.
Read the dials left to right. Each dial represents 1 digit in the number.
Look at the needle of each dial to take your reading.
not leaving a gap between them.
Read a needle hovering over a number by checking the dial to its right.

What is a fuel gauge sending unit?

The fuel gauge sender, also commonly referred to as the fuel sending unit, is the component responsible for sending the signal that operates the fuel level gauge in the instrument cluster. The fuel sending unit is made up of an arm, float, and a resistor that changes according the position of the float.

What will cause the fuel gauge not to work?

The most obvious problem is due to the faulty fuses and connector wirings. There is usually a black or yellow wire securing the connector of the fuel tank. If it is not grounded well or has lost connection, that will cause the fuel gauge unit to show inaccurate readings.

Why is my fuel gauge not working properly?

A fault in these parts will cause gauge failure or make it give incorrect readings. The four ways of how a fuel gauge can fail are: 1. Sending Unit Failure . The most common reason for a fuel gauge to not work. The gauge may read the voltage feedback from a dead sender as ‘Full’ or ‘Empty’. The fuel gauge won’t show the correct reading.

What causes gas gauge not working?
- Known Problems. The most common problem with the fuel gauge reported by Chevy truck owners is a complete failure to register the fuel level.
- gasoline corrodes the fuel gauge sensor.
- Solution. Disconnect the battery for 10 to 15 minutes.
  
  Why would a gas gauge stop working?
  
  Circuit Problems can cause the gas gauge to stop functioning normally. Depending on the location of the fault, the fuel sender may not have a source voltage, the gas gauge may have no fuel sender voltage, or the ground for either one may be interrupted. Loose connections and corrosion can also cause problems,…
  
  Why does my gas gauge drop to empty?
  
  About 5 years ago, my gas gauge started acting up on my 2002 Pontiac Montana van. The gauge dropped to empty although I knew I had gas in the vehicle. When the car is filled up, the gauge registers properly, but when the tank is at least a 1/2 tank or less, when sitting idle the gauge will drop down to empty.
  
  What does it mean when your computer is lagging?
  
  Flickering screen, stuttering sound, commands delaying in games or programs, Windows takes ages to start, opening programs are delayed or files are not getting saved, to name a few issues that can come up when your Computer starts to lag. Here is our step by step guide to diagnose, analyze and fix Computer lag yourself!
  
  How is the gas gauge in the instrument cluster?
  
  The gas gauge in the instrument cluster is the visual indication of activity in the fuel tank and sending unit. Some gas gauges are directly controlled by voltage feedback from the sending unit, while others are controlled by the instrument cluster, which itself gets voltage information from the sending unit.
  
  Flickering screen, stuttering sound, commands delaying in games or programs, Windows takes ages to start, opening programs are delayed or files are not getting saved, to name a few issues that can come up when your Computer starts to lag. Here is our step by step guide to diagnose, analyze and fix Computer lag yourself!
  
  What should I use to test my gas gauge?
  
  Before you begin testing your gas gauge, gather the following tools: an electrical wiring diagram (EWD), a digital multimeter (DMM), and basic hand tools. Then, run through the following tests to determine the source fo the problem. Instrument cluster self-test.
  
  How can I tell if my gas tank is full?
  
  Fuel sender test. Conduct the test when the tank is lower than half to avoid splashing hot oil. Use the multimeter to check for voltage on the pins, and it has to be 5 V or 12 V on one pin. Gas gauge test. This inspection involves another voltage testing, and the reading has to be exactly the same as the fuel sender test.
  
  What does the fuel gauge read when the tank is full?
  
  When the tank is full, there is low resistance to ground, and the needle reads high. As long as power and ground are wired properly to the gauge, if you remove the wire from the S terminal, the gauge should read empty, as there is no path to ground (Another way of saying it is there is infinite resistance to ground).
  
  Why does my gas gauge go from full to empty?
  
  This will send the crazy signal to the fuel gauge. This would be the time you see the gauge going from full to empty on it’s own, or usually after you fill up your vehicle it will act up from the sloshing around of the gasoline. This can get quite annoying, and will leave you not knowing how much fuel you actually have.
  
  How does the gas gauge work on a car?
  
  It holds the float assembly along with a resistor board that has small little metal ‘fingers’ that touch the board and send the signal to the fuel gauge to display the proper amount of fuel in the tank.
  
  How many miles can you Drive on a half tank of gas?
  
  If your car gets 30 miles to the gallon, this means you can drive about 300 miles on a half tank of gas. Warning: Driving your vehicle on low fuel or an empty tank can damage your ride or even lead to a crash. Now the fuel gauge in your car or truck is actually lying to you.
  
  What is the fuel gauge on an aoditeck boat?
  
  AODITECK Boat Fuel Tank Sending Unit Fuel Sending Unit Marine Truck Car Fuel Water Level Sensor Marine Gas Water Tank Sensor Fuel Gauge Sending Unit Truck Marine Gas Water Tank Sender 240-33 ohms 11″ . . Only 14 left in stock – order soon.
  
  AODITECK Boat Fuel Tank Sending Unit Fuel Sending Unit Marine Truck Car Fuel Water Level Sensor Marine Gas Water Tank Sensor Fuel Gauge Sending Unit Truck Marine Gas Water Tank Sender 240-33 ohms 11″ . . Only 14 left in stock – order soon.
  
  How does a fuel gauge work in a toilet?
  
  For a simplified overview of how the fuel gauge works, think of the float arm in the tank of a toilet. As the water rises, the float arm rises until it shuts off the fill valve when full.
  
  How do you check the fuel gauge on a boat?
  
  Touch the ice pick end of the test light to the connectors of the fuel gauge. If the light turns on, then you know that the gauge is getting power from the battery. If you are not getting power from the battery, check the connectors and wires back to the battery.
  
  Where is the transmitter for the fuel gauge?
  
  If you do the work yourself, you can get the job done much cheaper than leaving it to your mechanic, but remember that it is not an easy task for a beginner. To replace the fuel gauge transmitter, you must reach the connector where the fuel pump is located on the fuel tank. Most likely you will find it under the back seat or in the trunk.
  
  Touch the ice pick end of the test light to the connectors of the fuel gauge. If the light turns on, then you know that the gauge is getting power from the battery. If you are not getting power from the battery, check the connectors and wires back to the battery.
  
  What happens when the fuel gauge becomes erratic?
  
  What happens when the fuel gauge becomes erratic is that the little metal ‘fingers’ start to deteriorate from fuel additives, corrosion and just plain bad gas. Now, once there is any type of gap from a small amount of corrosion, these fingers start to touch the resistor board less and less which will send the wrong signal to the fuel gauge.
  
  Why does my gas gauge needle read empty?
  
  Now, once there is any type of gap from a small amount of corrosion, these fingers start to touch the resistor board less and less which will send the wrong signal to the fuel gauge. Once this starts to get worse, there will be portions of the fingers that are barely touching and others that are kind of flopping on and off the board.
  
  The gas gauge in the instrument cluster is the visual indication of activity in the fuel tank and sending unit. Some gas gauges are directly controlled by voltage feedback from the sending unit, while others are controlled by the instrument cluster, which itself gets voltage information from the sending unit.
  
  https://www.youtube.com/watch?v=wayaaCggQ7U
  https://www.youtube.com/watch?v=V-z24-YvQps
  
  What are the symptoms of a bad fuel meter Assembly?
  
  One of the first symptoms of a problem with the fuel meter assembly is erratic behavior from the gauge. If the fuel sending unit that is located in the gas tank fails or has any issues it can cause the needle or display to behave erratically.
  
  When to set trouble code for GM fuel level sensor?
  
  Late model GM vehicles will usually set a trouble code for the fuel level sensor when there is a problem with it. If your car has a code for this, you definitely need a new sensor. The only bad thing is, there is really no way to completely stop this from happening.
  
  How does the temp gauge work on a Saab?
  
  No check engine lights are on or anything. When i started from cold after putting in the temp sensor the gauge was already reading at the quarter mark and went up when the car warmed up. The gauge should read all the way at the bottom and come up from there.
  
  How many warning lights are there on a Saab?
  
  Click a link to learn more about each one. They are roughly ordered by importance, which tends to be by color (red, amber, yellow, orange, green, blue, gray). There are over 30 of them, so search carefully!
  
  Why does my fuel gauge always read high?
  
  Sometimes the Temp gauge reads ridiculously high, sometimes the Boost gauge does the same, and sometimes (less frequently) the Fuel gauge reads high. Removing and replacing fuse number 4 sorts the problem, but it returns within about a week.
  
  What happens to the gas gauge when the circuit is shorted?
  
  If the internal circuit is faulty, the gas gauge may only function in one section, such as between HALF and FULL or between EMPTY and HALF. If the internal circuits are shorted, they may peg to FULL or EMPTY. If the circuit is open, the gas gauge will likely sit at EMPTY and never move.
  
  If the internal circuit is faulty, the gas gauge may only function in one section, such as between HALF and FULL or between EMPTY and HALF. If the internal circuits are shorted, they may peg to FULL or EMPTY. If the circuit is open, the gas gauge will likely sit at EMPTY and never move.
  
  GM cars from the 1930s to the 1960s operate on a 30 ohm scale. At zero ohms in the sender, the float is on the bottom of the tank and the gauge should read empty. At 30 ohms, the float is at the top of its travel and the gauge should read full.

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