Skip the auto shop - Our mechanics make house calls

Q: Replaced Camshaft Position Sensor, now car idles rough, quits.

asked by on

This past weekend, replaced the camshaft position sensor on my daughters vehicle. Was running fine Sunday and Monday. Tuesday, rough idle, no pick up upon acceleration. Wednesday, no pickup upon acceleration and stalled 2 times at stop light. Not sure what is happening.

My car has 120000 miles.
My car has an automatic transmission.

A: Hi there. Why was the cam position sensor r...

Hi there. Why was the cam position sensor replaced? Was there a code stored, check engine light on? If the rough idle and stall started after the sensor replacement, try putting the old sensor back in and recheck the operation. If the car still has the concern, then the cam position sensor may not be at fault and this is simply an unfortunate coincidence. Is the check engine light currently on? Check for any codes, stored or pending, and proceed from there. The idle air control valve could be sticking or failing. Attempt to clean the valve with a suitable cleaner and see if the operation improves. If it does not improve, it still may be the idle air control valve is beyond maintenance and will need to be replaced. The safest route to take is to have a qualified technician perform an inspection to avoid replacing unnecessary parts. Your Mechanic has several available technicians that can assist you with a rough idle inspection.

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・Save up to 30%

Get a quote

What others are asking

Q: P0420 OBD-II Trouble Code: Catalyst System Efficiency Below Threshold (Bank 1)

Hi there: the P0420 OBD-II Error code indicates that the catalytic converter is not working as efficiently as it is intended. If the voltage of the downstream oxygen sensor decreases, and begins to fluctuate like the upstream oxygen sensor, it...

Q: Lost of power and will only go 40 mph and 15 mph up hill.

Hi there. Check the vehicle engine out to see if there is anything out of the ordinary. The loss of power could be a vacuum leak, misfire, or a transmission issue. First look for any vacuum lines that are cracked...

Q: Can engine control module be repaired

Hello. I do not believe that any module or computer on a vehicle can be repaired. Unfortunately, these are sealed units and must be replaced if they fail. In addition, many engine computers require special programming from the dealership once...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.