Skip the auto shop - Our mechanics make house calls

Q: Car shuts off in park and reverse

asked by on

Bought my car February this year with 96,000 miles on it. I figured it sat awhile so I did the normal maintenance on it. Drove it out a town a few times with no problem. I noticed it would shut off sometimes when I put it in park or reverse, no check engine light came on. Eventually my check engine light came on I ended up having to change my Idle air control valve, then the throttle position sensor. It's still shutting off in park or reverse, a little more frequently now, my check engine light isn't coming on so it's like a big mystery at this point

My car has 117000 miles.
My car has an automatic transmission.

A: Hi there. The stalling issue only in park a...

Hi there. The stalling issue only in park and reverse seems unusual. This may be caused by an engine vacuum leak, resulting in unmetered air entering the engine. It may be, a dirty/worn throttle body and/or a faulty MAF (mass airflow) sensor incorrectly calculating the incoming air to the engine. Low fuel pressure, a faulty CKP (crankshaft position) sensor, or a faulty CMP (camshaft position) sensor are all possible causes for engine stalling. There are other possibilities and replacing components without proper diagnoses, can be expensive and time consuming without resolution. I recommend having your vehicle’s stalls in park and reverse be diagnosed and repaired by a certified technician, such as one from YourMechanic.

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: Changed camshaft sensor but car still won't start, could it be the crankshaft sensor?

Hello, thanks for writing in. Most of the time, this code comes up when there is a difference between the crank and cam sensors. The most common failure is the crankshaft position sensor. These fail much more frequently than the...

Q: Rough idle and car dies - 2007 Chevrolet Impala

Hey there. This is a common sign of a dirty or failing idle air control valve. The idle air control valve monitors the air intake as it is mixed with fuel prior to being injected into the engine. This valve...

Q: Air conditioner not working

Hello. More information will be needed to properly diagnose this. If the the system is failing to blow cold air, the system will need to be checked for proper blend door operation, compressor operation, and refrigerant pressures. A leak check...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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.