If I let it sit for an hour then it will start right up?

2003 CADILLAC CTS

97,000 MILES • 6 CYL • 2WD • AUTOMATIC

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My 2003 Cadillac CTS stops working and shuts off mid drive without any symptoms. When I try to start it back up it cranks but does not fully turn over. If I let it sit for an hour then it will start right up

Dec 6, 2010 at 4:44 PM

SQM

CAR REPAIR CONTRIBUTOR
6,383 POSTS

Hello,

The issue does sound like a faulty crankshaft position sensor.
The crank sensor can go bad overtime and that will cause it to send incorrect data to the ECM. Which triggers the engine shutdown. After the shut down the engine may or may not start.

Take a look at these helpful guides:

https://www.2carpros.com/articles/symptoms-of-a-bad-crankshaft-sensor
https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

I have attached the crank sensor replacement procedure below for your reference.

Let me know of any questions.
Thank you.

Images (Click to enlarge)

Aug 10, 2022 at 8:01 PM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.