on a 2002 chevy express van 3500 code 1345 comes up runs good how do I no which senser is bad

Question

how do I tell which sener is bad on code 1345 on a 2002 chevy express van with 406000 mile on it

Answer 1

With that many miles you should replace them both. 

Possible causes:

- Cam sensor or crank sensor are loose on their mounting
- Faulty camshaft position sensor
- Faulty crankshaft position sensor