Skip the auto shop - Our mechanics make house calls

Q: The engine keeps shutting off and rpms slowly drop to zero

asked by on

While driving the engine dies and rpms slowly drop...all other things are good. Oil level good, full on gas, battery is charging and above 12 and temperature is good. What is going on?

My car has 100000 miles.
My car has an automatic transmission.

Hello. If the RPMs drop off right as the engine is stalling then the most common cause of this is a bad crankshaft position sensor.

This sensor tells the engine computer what the engine RPM speed is and what the position of the cylinders are. If it fails, the computer does not know the position of the engine so it will stall.

I typically install a computer scan tool to monitor the engine RPM to confirm that the signal is being lost before it dies. If it does, then I replace the sensor. If not then I check the other sensor signals to see what is going on.

If you are going to have this repaired, consider YourMechanic, as a certified mechanic can come to your home or office to properly diagnose your stalling issue.

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
  1. Home
  2. Questions
  3. The engine keeps shutting off and rpms slowly drop to zero

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: Low rpm & stalling

This is often times related to what is called an idle air control module which regulates the air flow at idle as the air enters the intake system and is mixed with fuel before being injected into the motor. When...

Q: replaced heater core,,,now the car has no tail lights or brake lights,or dash lights,,took dashboard out again all plugs r hooked

Hello, thank you for writing in. The first thing to do is look at the wiring and try to find an error or any damage. The electronics for the systems you say are effected are mostly located right there under...

Q: What does ECP and ECM mean and is it bad?

Hello. I suspect you mean EPC (not ECP), which stands for electronic pedal control or electronic "gas pedal linkage". There is no longer a physical cable, wire or lever between the gas pedal, and the throttle body on the engine...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...