Is there a problem with the throttle sensor on a Mercedes?

Mercedes-Benz throttle body or throttle position sensor found on C-Class, E-Class, S-Class, CLK-Class, SLK-Class may fail causing idle issues, no idle or poor acceleration. Symptoms of defective Mercedes throttle body or throttle position sensor include:

What causes an ECU fault on a Mercedes a class?

Mercedes A Class ECU & Air Mass/Flow Meter This ECU is a very common fault for the Mercedes A Class, it causes the engine management light to come on and fault code for the Air Mass/Flow Meter to be stored in the ECU’s memory. This fault can cause the engine to run rough and idle poorly.

What are the symptoms of a defective throttle possition sensor?

Symptoms of defective Mercedes throttle body or throttle position sensor include: A common problem that you may notice is that the car drives fine under normal acceleration. If you press the gas pedal to the floor or try to accelerate quickly or floor it, the engine stops responding, RPMs drop and it may even go into limp mode.

What’s the fault code for a 2001 Mercedes Benz?

Click to expand… For the ML class it does not apply to the 2001 models. Also the fault code in the bulletin is for DTC B9103 and DTC B9123. No others would be covered by the DTB. Post # 34 in this thread lists the DTB the parts, and all affected models.

When to replace the throttle possition sensor on a Mercedes Benz?

If you determine the throttle position sensor has failed on your Mercedes-Benz you will need to address this problem right away. In most cases, you will get code P0120 or P012x. Your options are to replace it with a new throttle position sensor.

What causes the throttle body on a Mercedes to fail?

When there are throttle body malfunctions the wrong amount of air enters into the engine causing problems with air/fuel mixture ratio. Here is a close up picture of a Mercedes throttle body. Mercedes throttle bodies made by Bosch and VDO may fail. Luckily these units are repairable.

What should Mercedes Benz do about the ignition problem?

Mercedes should put on their big boy pants, step up to the plate and do the honorable thing and pay 100% of the cost of this widespread problem instead of forcing it on the consumer who trusted them with their “quality automobile” lies” in the first place.

Is there a problem with my Mercedes-Benz C220 CDI?

Hy Have same problem c220 Cdi 2002 auto car sometimes starts but sometimes I put key in and nothing happens no noise no crank nothing and I have to hold the key in start position for 5 min then car starts.got it tested and I’ve been told the ecu doesent correspond with starter sometimes!

Are there any problems with the W124 E class?

Found in facelift models (220, 280, 320) the wiring loom biodegrades and yes, it will be expensive to fix. Head Gasket Failure. Symptoms such as oil leaks, foamy coolant and using a lot of water. Over Protection Relay Failing (OVP). Car will intermittently start and cut out as well as many other odd failures. Rust.

What does the throttle body do in a Mercedes?

The throttle body is where the throttle valve is mounted and is what control the amount of air that enters the combustion chamber. When there are throttle body malfunctions the wrong amount of air enters into the engine causing problems with air/fuel mixture ratio. Here is a close up picture of a Mercedes throttle body.

When did Mercedes Benz throttle actuator problems start?

Most Mercedes Benzes made in 1993 to 1995 have problems with throttle bodies also known as electronic throttle actuator or ETA. Most ETA’s problems are due to shorting wiring inside ETA loom and some due to internal components failures. When ETA fails car goes into so called “ Limp Mode”.

How much does it cost to repair a Mercedes throttle?

If you experience problems with your throttle body feel free to contact me and I will be able to repair your ETA. At Mercedes dealer new ETAs cost range from $1200 up to $5400 for V12 models each. And it doesn’t make sense to buy used ones as they use same biodegradable wiring insulation that can fail pretty fast.

When was the first 600SL throttle body made?

Throttle bodies made in 1993 for 600SL ONLY and all others made in 1994-1995 along with few 96 6 cylinders models have biodegradable wiring insulation that will fail and wires short. Some very few throttle bodies, about 1%, are not repairable due to wear and have to be replaced.

How to reset the throttle body on a Mercedes?

Rating is available when the video has been rented. This feature is not available right now. Please try again later. This is how to reset the electronic throttle body on Most Mercedes with an electronically controlled throttle. It will reset the position of the throttle plate at closed throttle. Loading…

Is there a code to replace the throttle possition sensor?

In most cases, you will get code P0120 or P012x. Your options are to replace it with a new throttle position sensor. Mercedes-Benz dealerships would be happy to help you or any Indepdement mechanic. Or you can replace the throttle position sensor yourself to save money.

Is there a problem with the Mercedes possition sensor?

How does the gas pedal work on a Mercedes?

Since 2000 Mercedes has been using drive by wire system. Which means you press the gas pedal but there is no cable connected directly to the throttle valve. Instead, there is a potentiometer that detects the position of the gas pedal.

How do you reset the throttle on a Mercedes?

First, try throttle reset procedure Turn the key to ON position. Position II that is. Press and hold the gas pedal for at least five seconds. Keep the pedal pressed. Turn ignition off but do not remove the key. Now release the gas pedal. Remove key. Wait a minute before you restart your Mercedes.

What to do if your throttle possition sensor has failed?

What to do if your car has no throttle response?

A reset / relearn of the ECU is required to bring the throttle response back. CEL needs to be reset with on OBD scanner. The procedure above may or may not reset the throttle position values. It did on mien about 10 times. I just tried to do it again and the throttle pedal position sensor does not rectify itself. The car will only idle.

How to reset the throttle response in a Mercedes?

Turn Key to “off” position (dont remove the key) and then release the gas pedal. than wait at least 2, if not 3 minutes, for the system to reset. Keep the faith ! OK… for my own benefit, i have to ask.

Why is there no throttle response when the pedal is depressed?

If the battery reaches too low of a level and then it’s jumped to start the engine; you will experience similar issues. A reset / relearn of the ECU is required to bring the throttle response back. CEL needs to be reset with on OBD scanner. The procedure above may or may not reset the throttle position values. It did on mien about 10 times.

How to fix no power no start on most Mercedes-Benz?

HOW TO FIX NO POWER NO START ON MOST MERCEDES-BENZ VECHICLES DIY. – YouTube HOW TO FIX NO POWER NO START ON MOST MERCEDES-BENZ VECHICLES DIY. If playback doesn’t begin shortly, try restarting your device.

What happens when catalytic converter is clogged in Mercedes?

If your catalytic converter is clogged you will notice a drastic drop in fuel efficiency and real struggle getting your Mercedes to accelerate. If the cat is completely clogged your car won’t even start.

What are the most common Mercedes Benz transmission problems?

Top 5 Mercedes-Benz Transmission Problems. Won’t come out of Park gear due to a defective brake light switch. ( DIY How to replace the Brake Light Switch) Continue to read if you would like to learn how to troubleshoot your Mercedes-Benz transmission yourself and where you should start. 1. Check Fluid Level

What happens when the ECU fails on a Mercedes?

Faults with the output and secondary transmission speed sensor are also very common. When the gearbox ECU fails, the vehicle will experience a loss of power, limp home mode and poor to limited gear selection.

Why are my shift controls leaking in my Mercedes?

You CAN do this yourself if you have the right information and equipment! High Mileage and age can raise havoc on the shifting patterns of an automatic transmission. Even if the fluid has been changed on a regular basis, they still wear out. Seals harden and leak both internally and externally. Vaccum and cable shift controls leak and fail.

What should the idle Hell be on a Mercedes Benz?

In any case, it should NEVER be as high as 1500 by itself. The warm-up stuff brings it to 800-1000, something like that. Abnormal Operation Here’s a typical pattern:

What causes a Mercedes-Benz transmission to fail?

We see these transmission fail in rare cases when water enters the transmission via the oil cooling lines or the radiator on cars equipped with Valeo radiators. The top part of the radiator on your Mercedes-Benz contains the chamber for the engine coolant/antifreeze while the bottom part contains the chamber for the transmission oil cooling.

What are the problems with the throttle system?

That’s why you must always check for any of these common problems: 1 The throttle body is filled with rust 2 Air filter or vacuum are leaking 3 A sensor or electrical connection is loose 4 There’s severe physical damage on the throttle system

How is idle speed controlled by the ECM?

On most systems, idle speed is entirely controlled by throttle plate angle. Carbon buildup can accumulate over time around the throttle plate, which the computer responds to by adjusting the home position. If the accumulation occurs gradually, the ECM will learn the new home position on the fly.

How does an electric throttle actuator control work?

An electric throttle actuator control (TAC) is made of a throttle control motor and two throttle position sensors. When the throttle valve moves, the two throttle position sensors respond with a signal to verify position. These sensors act as potentiometers to convert the throttle valve position into a voltage signal that is sent to the ECM.

How long does it take for GM throttle body to relearn?

If you don’t do a relearn procedure, the PCM will “hunt” for a new baseline idle. It will eventually learn it on its own, but it may take over a week of driving, during which time you will experience high and low idle speeds and possibly rough idle. 1) Start the engine and let it idle in park for 3 minutes.

Why did I switch to throttle by wire?

The main reason for the switch to TBW is that it allows the ECM to work in harmony with other engine control systems such as cruise control, traction control, torque management and stability control. Computers have taken over control of the driver’s right foot when it comes to selecting the optimum throttle opening.

What to do if your Mercedes possition sensor is not working?

Don’t start the car. Press and hold the gas pedal for at least five seconds. Keep the pedal pressed. Turn ignition off but do not remove the key. Now release the gas pedal. Remove key. Wait a minute before you restart your Mercedes. This allows resetting the High and Low points of the gas pedal.

What causes vibrations in a Mercedes Benz car?

Mercedes-Benz motor mounts are fluid filled instead of rubber mounts that are used on most cars. Mercedes-Benz the engine mounts start to loose fluid around the 100k mile mark. Once a crack develops on the motor mount, they loose all the fluid over time and the vibrations get worse.

When do Mercedes Benz motor mounts start to loose fluid?

CAUTION: Make sure no one is standing on the front or back of the car when you perform this test. Mercedes-Benz motor mounts are fluid filled instead of rubber mounts that are used on most cars. Mercedes-Benz the engine mounts start to loose fluid around the 100k mile mark.

Why does my Mercedes C class run rough off-idle?

21 people found this helpful. Hmmm, so what you’re saying is it idles ruff but passed that part of the test and runs smooth off-idle but fails that part because it’s running too rich ( too much fuel). If you had a vacuum leak at the throttle body you’ll be running lean not rich as you are now.

Why do I get a rough idle when I Turn Off the engine?

In direct injection engines, the fuel injector delivers fuel right into the cylinder; so the valves never get fuel spray. After shutdown, crankcase vapors rise to the top of the engine and settle on the intake valves; where they condense and harden. The result is, carbon buildup that can cause, a rough engine idle.

What happens when the throttle gets stuck in an open position?

When the throttle gets stuck in an open position than your vehicle will receive too much air and cause it to have a high or fluctuating idle. What are signs of a bad Throttle Position Sensor? Acceleration issues: A bad TPS may cause all sorts of power issues. Your engine may start up but it will have little to no power and it causes it to shut off.

Can a bad throttle position sensor cause spontaneous acceleration?

Your engine may start up but it will have little to no power and it causes it to shut off. On the other hand, it can also cause your car to have spontaneous accelerations even if you didn’t step on the gas. Unstable Engine Idle: Faulty position sensors can cause sporadic idle conditions due to fluctuating airflow.

How to find the Mercedes engine error code?

The table shows the error codes for the Mercedes engine. To find a word or phrase on the page, press Ctrl + F in the window that appears, enter the error code or part of the phrase and click the “Find” button, as a result, the decoding of the specific Mercedes error code you are interested in will appear.

What to do if your Mercedes throttle sensor is defective?

Your options are to replace it with a new throttle position sensor. Mercedes-Benz dealerships would be happy to help you or any Indepdement mechanic. Or you can replace the throttle position sensor yourself to save money. If your throttle body is defective, you may not be able to repair it yourself.

Can you read the fault code on a Mercedes Benz?

Can read fault codes from multiple systems such as transmission, engine, ETS, airbag and more. Can clear fault codes. Can read and erase all fault codes on Mercedes-Benz cars. Only works on MB but can perform further troubleshooting including SBC brake systems, convertible systems, Air Conditioner (A/C) system. 3. Mercedes-Benz Star Diagnostic DAS

How much does it cost to repair a Mercedes-Benz p0221?

The cost of diagnosing the P0221 MERCEDES-BENZ code is 1.0 hour of labor. The auto repair’s diagnosis time and labor rates vary by location, vehicle’s make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

What causes the throttle possition sensor to stop working?

If you press the gas pedal to the floor or try to accelerate quickly or floor it, the engine stops responding, RPMs drop and it may even go into limp mode. Turn off the engine and restarting it usually fix the problem. In ost cases, the issue is caused by either a defective pedal position sensor or a bad throttle position sensor.

Where is the throttle position sensor on a W208?

Do you mean the Pedal position sensor (B37) located in the left side of the engine bay Task – detects the accelerator pedal position and passes the information to the ECU – which then drives the throttle valve actuator (M166) On a w208 this unit will have a cable connection a spring & a sensor.

How to reset throttle possition sensor in Mercedes Benz?

First, try throttle reset procedure Turn the key to ON position. Press and hold the gas pedal for at least five seconds. Turn ignition off but do not remove the key. Remove key.

How to get Mercedes SLK320 code p0120?

This video shows level of effort required to replace the pedal in a 2001 Mercedes Benz SLK 320 Getting code P0120, requires replacement of the pedal. This video shows level of effort required to replace the pedal in a 2001 Mercedes Benz SLK 320 Skip navigation Sign in Search Loading… Close This video is unavailable.

What to do if your throttle body is defective?

If your throttle body is defective, you may not be able to repair it yourself. An alternative solution is to use a third party that will refurbish your throttle body. You will need to remove the throttle body from your engine and ship it out to companies that repair these units.

Where is the throttle possition sensor on a Mercedes?

Another weak point is the throttle position sensor. On models such as E-Class W210 and W208, the Throttle Position Sensor is mounted near the front left strut, on the front of the brake fluid reservoir. Replacing it takes less than 10 min and doesn’t require any special tools other than a 10mm socket and a screwdriver.

How long is the delayed acceleration in a Mercedes C class?

As for the length of the delay, Kambites is right for most cars – it’s around a third to a half of a second. My year 2000 330ci was just over a second (I measured it using my friend’s professional filming equipment and software), but that was a very extreme case from an early implementation of DBW.

Why does my Mercedes Benz hesitate to accelerate?

-Air filter and throttle body are clean. -I haven’t changed the MAF in the 2 years that I’ve owned the car, and i tried running the car with the MAF unplugged; the problem was the same except now the idle was constantly low and rough. The problem is slowly getting worse. I’m contemplating ordering a new MAF or maybe a set of new coils..

What happens when you close the throttle on a car?

Slow engine return to idle: A failing TPS can report the minimum throttle position values incorrectly which can stop the engine entering idle mode when the throttle is closed. Normally when the throttle is closed the engine fuel injectors will be deactivated until a defined engine RPM speed is reached and the engine brought smoothly to idle speed.

What kind of sensor is on the throttle?

There is a lot here and it seems to talk about two different sensors. A throttle body position sensor and a throttle position sensor that is attached to the acceleration pedal. I guess you can never have too much info.

Navigation