Q: Bad crank sensor

asked by on July 22, 2016

My car has gone around 120,000 miles. At the dealership I was told that I have a bad crank sensor. It was supposedly caused by a broken fan, as a result of a rock being stuck in the alternator. I took the car to a mechanic I know and he told me there is a small likelihood of that happening. I'm reluctant to fix something that isn't necesssary, especially because it is not under warranty. How can I know for sure?

Hello. Just about anything is possible but it is unlikely. I have seen crank sensors go bad and cause many issues, but if you are not having any other issues then I think that it is unlikely. If I knew what the issues were with the car I could tell you for sure.

If you want a second opinion, consider YourMechanic, as a certified mechanic can come to you home or office to diagnose and ]replace your crankshaft position sensor](https://www.yourmechanic.com/services/crankshaft-position-sensor-replacement) if necessary.

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

Steering wheel vibrations can be seen and felt

Hi there. If the steering wheel is vibrating at this speed and it is occurring whether you apply the brakes or not, then you more than likely have a tire that is failing. When a tire begins to separate, this...

Car won't turn over or start

You likely have an ignition switch problem, which is common with your vehicle. You could also have a starter relay problem, which could cause the same issue. The only way to verify the problem is to have an in-person inspection....

Driver stability control failure

Hello. This usually means that the car’s traction control and stability control system has a problem and is now disabled. The stability control maintains stability when cornering at high speeds, traction in slippery wet conditions, and provide controlled braking when...

Related articles

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.
Symptoms of a Bad or Failing Alternator Belt
A failing alternator belt can cause the Battery Light to turn on, dimming or flickering lights in the car, and engine stalls.
Symptoms of a Bad or Failing Crankshaft Seal
If your car is reaching high mileage or is experiencing oil leaks, it may be time to replace the crankshaft seal.