Skip the auto shop - Our mechanics make house calls

Q: Mercedes engine is trembling

asked by on

HI, The issue started when i parked teh car for some time and once i came back ans started the car my check engine light came up with the O2 Sensor Errors along with throtle actuator, the guy changed the sensors along with the ignition coils the engine light gone but after like for weeks came up again with the same codes,

what possibility could be the cause, now the car is agin in the garage and teh guys are tryingto figure out what actually is the issue

A: Hello. Your issues may be related to the th...

Hello. Your issues may be related to the throttle actuator that was alarming in the first place. If they know for a fact the throttle system as a whole is perfect, the next step would be to look into the other codes that have been set. There are several types of O2 sensor errors, and knowing which kind was tripped would be beneficial. If the O2 sensor code indicates a lean reading you are looking at a poor mass airflow sensor issue, a low fuel pressure, or an engine misfire. If the codes indicate a rich reading you may be looking at a bad fuel injector, a number of fuel delivery issues, an exhaust leak, or a bad O2 sensor. Judging by the "trembling" coming from the engine, I suspect your issues are related to a lean reading. I would focus on trying to find the cause of a misfire. If a misfire is one of the other codes tripping, you will want to look into fuel and spark first.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: HVAC motor blower broken

This can be caused by several things. The blower motor circuit has 3 major components. The switch, the resistor and the motor. Failure of the resistor and the motor are the most common and both can fail at the same...

Q: Check Engine Light on; car stays at one speed

Hello. It sounds like you have a transmission problem. If the transmission is staying in one gear, I would have your transmissions inspected by a certified mechanic. Since the other control units are missing, information provided by the transmission control...

Q: Changed catalytic converter, no lights on dashboard, but codes for catalytic converter & O2 sensor still remain

Hello. If you have changed these parts and if the check engine light is not on but the codes remain then you should drive the vehicle for a while. it can take about 500 miles for them to clear. If...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.