Skip the auto shop - Our mechanics make house calls

Q: Camshaft position sensor actuator A. Bank 1

asked by on

Car starts and runs then when u turn the car off and start it up again it runs rough and misses out sometimes when if u push the gas down it will smothered out. ..just started this last week

My car has 90000 miles.
My car has an automatic transmission.

A: Hi there. Most modern engines have both cam...

Hi there. Most modern engines have both camshaft position sensors (multiple) and crankshaft position sensors. Camshaft position sensors, in conjunction with crankshaft position sensing, allows very precise timing for ignition and fuel injection. When a camshaft position sensor fails, or works sporadically as in your case, engine management shifts to a "degraded timing mode" which is less precise, throws the Check Engine code for the failing cam sensor, but will still run. To have this taken care of, I recommend having a professional, like one from YourMechanic, diagnose the stalling problem and perform the proper repairs.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: Startup problems, occasional stalling

Hello. It sounds like the mass airflow sensor may have failed, causing the problems you are having starting your car and idling. The mass airflow sensor helps regulate the air/fuel mixture the engine receives. When it is not working properly,...

Q: Starting problems

Hi, there is a recall on these cars about the TIPM, or Totally Integrated Power Module. If the camshaft position codes have disappeared I would take a look at the TIPM. If the codes are still present, then there may...

Q: Message come up Reduce engine power

A reduced power light usually indicates a fairly serious problem with the throttle system. When this light illuminates the vehicle will often go into a “safe mode”, which will severely limit the speed of the car and in some cases...

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...
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...
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.