P1345 CHEVROLET - Crankshaft Position-Camshaft Position Correlation
- Engine mechanical condition-Valve timing off
- Cam sensor or crank sensor are loose on their mounting
- Faulty camshaft position sensor
- Faulty crankshaft position sensor
If a P0016 or P1345 is resetting without any engine performance concerns but the above information did not isolate a cause for the DTC, replace the Cam Phaser Actuator sprocket.
1997 Chevrolet Pickup
1999 Chevrolet Tahoe
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When is the code detected?
- Engine Light ON (or Service Engine Soon Warning Light)
- Engine hard to start
- Engine stall while driving
P1345 CHEVROLET Description
The Camshaft Position (CMP) sensor is triggered by a notched reluctor wheel built into the exhaust camshaft sprocket. The CMP sensor provides 6 signal pulses every camshaft revolution. Each notch, or feature of the reluctor wheel is of a different size for individual cylinder identification. This means the CMP and crankshaft position (CKP) signals are pulse width encoded to enable the powertrain control module (PCM) to constantly monitor their relationship. This relationship is used to determine camshaft actuator position and control its phasing at the correct value. The PCM also uses this signal to identify the compression stroke of each cylinder, and for sequential fuel injection. The CMP sensor is connected to the PCM by a 12-volt, low reference, and signal circuit.
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