Skip the auto shop - Our mechanics make house calls

Q: The Check Engine light blinks and the car stalls. Is this my catalytic converter?

asked by on

The engine light blinks. It's cuts off when I come to a complete stop. The engine rpm are not the same as the mph.

A: This may be related to many different thing...

This may be related to many different things such as a bad oxygen sensor (this monitors the activity of the catalytic converter), a bad or dirty idle air control valve, or potentially low fuel pressure. The low fuel pressure will generally cause a lean fuel condition causing the engine to starve for fuel resulting in it stalling.

The oxygen sensor reads the exhaust gas content and relays this info to the computer which then makes fueling adjustments based upon this. The idle air control valve reads the air intake as it is mixed with fuel and relays this to the computer which then makes adjustments to fueling. When this is not working properly, this may cause the car to struggle to idle properly or even stall.

I would recommend having a professional mechanic, such as one from YourMechanic, come to your location to determine why the Check Engine Light is on and diagnose and repair your idle air control valve if needed.

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: Engine lost power driving on the road

These issues could be caused by a number of problems. This could be anything from a mechanical issue (low oil pressure, intake air system leak, etc.) to an electrical problem (throttle position sensor, oxygen sensors, etc.). Since the Check Engine...

Q: Squealing when I push the gas won't go over 3000 rpm 30 mph at most.

The lack of power you are describing may be related to a clogged catalytic converter. As you may already know, the catalytic converter converts toxic exhaust gases into less harmful pollutants that are suitable to be expelled into the atmosphere....

Q: Starts up and dies down after driving through rain

Hey there. There are several things that should be checked. You need to see if the air filter got soaked with water and replace it if it did. You may have burned out the mass air sensor if it got...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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.