Skip the auto shop - Our mechanics make house calls

Symptoms of a Bad or Failing Crankshaft Position Sensor

crankshaft position sensor

Bad or Failing Crankshaft Position Sensor Inspection

by a top-rated mechanic at your home or office

The crankshaft position sensor is an engine management component found on virtually all modern vehicles with internal combustion engines. It monitors the position and rotational speed of the crankshaft and sends the information to the computer so that it can make the appropriate adjustments based on the operating conditions. The crankshaft speed and position are some of the most important engine parameters used in engine calculations, and many engines cannot run without it if the crankshaft position sensor is not providing an accurate signal. Usually a problematic crankshaft position sensor will produce a few symptoms that can alert the driver of a potential problem that should be serviced.

HAVE SYMPTOMS OF CAR TROUBLE?
Get an $80 diagnostic
by a top-rated mechanic at your home or office.

Get a quote · Book an Appointment · Our expert mechanics come to you.

1. Issues starting the vehicle

The first symptom that is most commonly associated with a bad or failing crankshaft position sensor are issues starting the vehicle. The crankshaft position sensor monitors the position and speed of the crankshaft and other parameters that play an important role when starting the engine. If the crankshaft position sensor is having a problem, the vehicle may have intermittent starting issues or may not start at all.

2. Intermittent stalling

Another symptom commonly associated with a problematic crankshaft position sensor is intermittent stalling. If the crank position sensor or its wiring have any issues, it can cause the crankshaft signal to be cut off while the engine is running, which can cause the engine to stall. This is usually a symptom of a wiring problem, however a bad crankshaft position sensor can also produce this symptom.

HAVE SYMPTOMS OF CAR TROUBLE?
Get your car fixed at your home or office.

Get a quote · Book an Appointment · Our expert mechanics come to you.

3. Check Engine Light comes on

Another issue of a potential problem with the crankshaft position sensor is an illuminated Check Engine Light. If the computer detects a problem with the crankshaft position sensor’s signal, it will activate the Check Engine Light to alert the driver of the problem. A Check Engine Light can also be set off by a wide variety of other issues so having computer scanned for trouble codes is highly recommended.

The crankshaft position sensor is a very important sensor for proper functionality and performance due to the vital signal it provides for engine calculations. When it has any issues, this can quickly lead to problems that affect the drivability of the vehicle. For this reason, if you suspect that your crankshaft position sensor may be having an issue, have the vehicle inspected by a professional technician, such as one from YourMechanic. They will be able to diagnose your car and replace your crankshaft position sensor if necessary.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Still not sure about your car's issue?
Diagnose your car
What kind of issue are you experiencing?
Brakes are squeaking
Car is not starting
Car is overheating
Car is shaking (vibrating)
Fluids are leaking
Heating and A/C
Smoke or steam is coming out of the car
Warning light is on
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

P0121 OBD-II Trouble Code: TPS "A" Circuit Range Performance Problem
P0121 code definition Throttle Pedal Position Sensor/Switch (TPS) A Circuit Range Performance Problem What the P0121 code means P0121 is a generic OBD-II code which indicates that the Engine Control...
P0222 OBD-II Trouble Code: Throttle/Pedal Position Switch/Sensor B Circuit Low Input
P0222 code definition Throttle/Pedal Position Switch/Sensor B Circuit Low Input What the P0222 code means The manufacturer specifies a range of acceptable voltage to be produced from the throttle position...
How to Buy Fuel Treatments
Adding a fuel additive to your gas tank when you fill up is one way to clean vital engine parts of deposits, improve the performance of your engine,...


Related questions

Q: My vehicle is overheating and the overheating light comes on. What could that be?

Hi there. If the engine is overheating and the light is coming on, then either the engine is overheating from a faulty thermostat, water pump, or burned head gasket, or the coolant temperature sensor is not working properly. Check the...

Q: Start up is okay. Blue smoke, rough idle, and stalling. Cannot rev motor. (2002 Nissan Elgrand)

The blue smoke is due to oil leaking into the combustion chambers. The cause can vary from fairly easy to fix worn out valve stem oil seals to more costly faults such as leaking piston rings or head gasket failures....

Q: Had crankshaft sensor replaced, and car is still stalling when slowing down.

Hello, thanks for writing in. If the engine is only stalling when coming to a stop, then it may be a defective crankshaft sensor that was installed or commonly this is caused by a dirty or failing throttle body. I...