Skip the auto shop - Our mechanics make house calls

Q: Car stalls out of nowhere

asked by on

For the last few of months my vehicle has died on me while driving, no stuttering or anything like that. The engine will just turn off with no warning and the car will coast to a stop. Once stopped the vehicle will not turn over again, as if the battery is dead, however the battery is good as it has been checked. The only way to get the car running again is by jumping it with another vehicle. After that, the vehicle will run fine again until the next occurrence. It seems to be happening around the same time every month, so I believe it may die at a certain number of miles but I'm not certain as I have not taken down mileage at each occurrence as of yet. Air filter has been replaced and diagnostics at a local Auto Zone gave "ECM malfunction" code. I've read that these symptoms could be due to the Crankshaft Position Sensor needing replacement, instead of having to replace the ECM to save money and hassle as there are no Saab Dealers near me that I'm aware of for reprogramming. Thanks

My car has 150000 miles.
My car has an automatic transmission.

A: Hello. It may be possible that a faulty cra...

Hello. It may be possible that a faulty crank position sensor or wiring are the cause of your stalling. However, in most cases, a vehicle with a crank position sensor fault will not need to be jump started in order to start again.

A few things I would check are the crank position sensor and the associated wiring, as well as the battery cables and battery. Keep in mind that the ECM malfunction code is a great indicator that the ECM probably needs to be replaced, or at least reflashed. If you need help with a diagnosis, a certified professional from YourMechanic can come to your car's location to inspect the stalling problem and follow through with repairs.

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: Shift lever module needs reprogramming.

The model you describe 42250 is not a model Saab, but I find an Aero model with the 2.0 engine. The gearbox light being on indicates a problem and you will need to have the vehicle scanned to see what...

Q: ECU related

Hi, thanks for writing in. By the information you've provided, it sounds like there may be a connection inside the ECU that has broken. When a soldered connection breaks due to vibration, or an impact, sometimes there will be a...

Q: Rear end noise when going over bumps

You will need to replace the rear stabilizer bar, bushings and brackets using a new design part number from Mazda using kit part number B3Y0-28--10X. This is a new design that will fix the noise you are having. The part...

Related articles

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...