Skip the auto shop - Our mechanics make house calls

Q: Car sputters and shakes when I accelerate

asked by on

Car sputters and shakes upon acceleration, check engine light is solid, but on all the time whend the car is running, replaced spark plugs and wires, and fuel pump, that did not help, it continues to sputter upon acceleration, I'm thinking it cold be a o2 sensor or carbon build up in the egr valve, please help.

My car has 143500 miles.
My car has an automatic transmission.

Hi There, As you know, this may be caused by a variety of things, one of which you already suspect which is an Oxygen sensor. As you may know the oxygen sensors which are part of your emissions system read exhaust gases to determine whether or not the appropriate amount of oxygen is present in the exhaust. Based upon this reading, this information is relayed to the car’s ECU which then makes a determination as to whether or not to add more or less fuel to the engine. When too much or too little oxygen is present, this will cause check engine light to come on. Too much oxygen may be present in the exhaust gas due to things like an exhaust leak, a vacuum leak, a faulty mass air flow sensor (causing a lean fuel condition) or faulty fuel injectors. Too little oxygen may be present in the exhaust gas may be caused by things like a clogged air filter, a failing mass air flow sensor (causing too much fuel to be introduced to the motor), bad fuel injectors or a clogged catalytic converter. When the O2 sensor is not working properly, this will cause false readings to be relayed to the computer causing inaccurate adjustments to be made to the intake and fuel system in your engine.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: No pressure to accelerator.

It sounds like there is an issue with your accelerator cable. It is possible that it may be broken or has come detached from the throttle of your engine. I would recommend that you enlist the help of a certified...

Q: A rubbing noise in front wheel

It really depends on whether or not you were experiencing the noise before you made these repairs. If so, the issue could be caused by a CV joint that is damaged. I would recommend having one of our mobile mechanics...

Q: Car is jerking for a while and then runs fine

The TCC is the torque convertor clutch solenoid inside the transmission. To get it replaced you would need to have the pan removed and the TCC solenoid tested and replaced. If all your drive issues start to happen after...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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.