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

asked by on June 05, 2016

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?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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

Loud grinding and stuck feeling at front tire on driver's side

Hello. There are a few things that this can be. Most of the time it is due to a failing front bearing. When a bearing fails this noise will occur. I typically get the vehicle in the air and spin...

Repeated engine stalling, even when running and driving

An intermittent problem can be one the most difficult to correct, since the problem needs to be present to best diagnose it. But there are a few things that can lend to this problem. Some possibilities are the Mass Airflow...

oil usage

In my experience with engine oil consumption I have seen some engines use less than a quart in 5000 miles and others use one quart every 1000 miles. The only way to know exactly how much you are using is...

Related articles

Can Sensors Be Cleaned or Do They Need to Be Replaced?
In In most cases, sensors for your automobile will need to be replaced if they fail, but depending on the type of sensor and its location or function, some can be cleaned and reused. Sensors can come in many...
How Long Does an EVP Position Sensor Last?
An An integral part of your vehicle's EGR (exhaust gas recirculation) system is the EVP position sensor. This sensor has the important job of figuring out where the gate is positioned in order to allow gases to pass through to...
Can a Bad Sensor Prevent a Car From Starting?
If your car isn't starting or has a hard time starting, a faulty sensor may be to blame. Car sensors monitor data to keep your car running smoothly.