Vehicle has code P1345, twice?

2002 GMC ENVOY

208,800 MILES • 4.2L • V6 • 2WD • AUTOMATIC

HOGFISH666

MEMBER
1 POST

Vehicle has the code P1345, twice. I have changed the camshaft sensor, crankshaft sensor, and the VVT solenoid. I have cleaned the connectors for each of these. After replacing, the code went away for 30 seconds, then returned. The engine runs and drives great, no rough running or stalling. Can not pass inspection with this code. No drivability or emissions problems. What could it be!? Thanks.

Sep 25, 2024 at 7:10 PM

STRAILER

✓ASE Certified Mechanic
54,832 POSTS

A P1345 code indicates a "Crankshaft Position (CKP) - Camshaft Position (CMP) Correlation" fault. Engine Control Module (ECM) has detected that the timing relationship between the crankshaft and camshaft is incorrect. So, this typically means the camshaft actuator and timing chains need to be replaced. But I have seen a fresh oil change with Lucas oil treatment sometimes help the problem long enough to get through inspection. Check out the images (below). Please upload pictures or videos in your response of any problems so we can see what to help you with.

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Sep 26, 2024 at 2:35 PM