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P0343 Diagnostic Trouble Code Discussion for October 2013

CMP Sensor Circuit High Voltage

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Trouble Ticket Help Requests for DTC P0343
Help Request Posted
2001 GMC Sierra 3500 SL 8.1L MIL Lamp on VIN: 3GDKC34G11
P0343: CMP Sensor Circuit High Voltage. I have this truck belongs to city street department. Cust complaint hard start intermittently, but more noticeable when hot. Got the condition to duplicate, sounded like timing way off. Ran camshaft 1X signal at PCM pin 73 (brn/wht) and started with a good 12 ...
October 23, 2013