Why did my Honda Civic fail the smog test?

My Honda civic failed the smog test due to “monitors not ready”. I have been told by 3-4 different mechanics just to drive the car around. This has not helped. Before taking the car to get tested I had a oil change and gasket repaired due to small oil leak. What can help get my car’s monitor to read?

Why is my smog check OBD 2 incomplete?

There are several reasons why the monitors may be incomplete. If your car has recently been repaired for a problem that set a DTC (check engine on) and the technician cleared the DTC, he also erased the monitors. Also, if battery has been disconnected, replaced or needed a jump-start, the monitors may be erased.

Why are my Honda Civic monitors not ready?

Sometimes simply driving an extend length of time does not necessary set monitors (or make the monitors complete/ready). Your Honda Civic’s engine control unit performs internal self-tests in order to ensure your the engine is running efficiently and not polluting.

Can a DTC erase a smog check monitor?

If your car has recently been repaired for a problem that set a DTC (check engine on) and the technician cleared the DTC, he also erased the monitors. Also, if battery has been disconnected, replaced or needed a jump-start, the monitors may be erased.

How often do you need to scan monitor on Honda Civic?

Remember not to press your Honda’s brake or shift gears during deceleration. This should complete the drive cycle on your Honda Civic. To ensure all monitors are complete use a scan tool to view the monitors. You may want to complete the drive cycle 2-3 times.

What’s the cold start temperature for a Honda Civic?

The following is a Honda Civic OBDII Drive Cycle Pattern. Cold Start: Begin from Cold Start, and ignition in OFF position for at least 1 hour. ensure your Honda’s fuel tank is between 1/4 and 3/4 full and engine coolant temperature must be below 122°F and within 11°F of the ambient air temperature.

What’s the idle time on a Honda Civic?

Do not leave the key on prior to the cold start or the heated oxygen sensor diagnostic may not run. Idle Time: Run your Honda Civic’s engine (do not drive) for 2 1/2 minutes with the air conditioner on and rear defroster on.

What do you need to know about Honda Civic cold start?

Cold Start: Begin from Cold Start, and ignition in OFF position for at least 1 hour. ensure your Honda’s fuel tank is between 1/4 and 3/4 full and engine coolant temperature must be below 122°F and within 11°F of the ambient air temperature. Do not leave the key on prior to the cold start or the heated oxygen sensor diagnostic may not run.

What should I do when my Honda Civic is not ready?

During this time the Oxygen Sensor O2 response, Air Intrusive (AIS System), EGR Flow, Purge Valve, Misfire Detection, and Fuel Trim diagnostics will be performed. Deceleration: During this step you want to slowly let off the accelerator pedal.

Is the Honda Civic ready for the smog test?

The entire process of self-testing various emission control systems is called a Drive Cycle. By following the Honda Civic drive cycle below you will be able to get the monitors to run, and if all tests pass, become ready for the smog test. Obey all traffic laws while performing drive cycles.

Why does my Honda Civic DX turn off when I accelerate?

My 91 civic dx turns off when I accelerate at the light 3 times already : ( sucks 10 people found this helpful. It could either a faulty relay, the one that regulates the fuel pump circuit. Could be a dirty fuel pump sock. Could be a fuel pump going bad. Could be bad gas. Could be a faulty ECU. Could be a faulty Fuel Pressure Sensor.

Why does my Honda Civic cut off when I hit the gas?

It warmed up (the motor) an it idles fine u put in drive hit gas it sputters acts like its gonna die. Sumtimes it dies out an it sounds like abuncha air comin thru my air filter an it goes poof an it looks,like smoke comin outta,my filter. No check engine light.

How long does it take to decelerate a Honda Civic?

If the catalyst (Catalytic Converter) is marginal or the battery has been disconnected, it may take 5 complete driving cycles to determine the state of the catalyst,or in order to Complete the CAT Monitor. Decelerate: This will perform the same diagnostics as in the first Deceleration.

How many miles do you need to drive a Honda Civic?

You will need to drive your Honda Civic for at least 200-300 miles through various driving conditions in order to complete the required Emission Monitors. Sometimes simply driving an extend length of time does not necessary set monitors (or make the monitors complete/ready).

How can I get my car to pass the smog test?

This will help the vehicle pass the smog test. Step 3: Have the oil changed before the smog test . While this will not guarantee a passing result, dirty oil can release additional pollutants.

When was the smog test for cars introduced?

Smog or emissions testing was introduced in the 1970s when the Clean Air Act went into effect. Smog checks verify that a vehicle’s emissions system is working properly and the vehicle is not pushing pollutants into the air.

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