P1325 BUICK, CADILLAC, CHEVROLET, GMC, PONTIAC, SATURN: CRANKSHAFT POSITION (CKP) RELUCTOR WHEEL PERFORMANCE.
POST UPDATED IN May, 2023
P1325 BUICK, CADILLAC, CHEVROLET, GMC, PONTIAC, SATURN: CRANKSHAFT POSITION (CKP) RELUCTOR WHEEL PERFORMANCE.
The CKP Sensor (Crankshaft Position Sensor) produces a voltage signal that lets us know the crankshaft position and speed. This AC voltage is different in amplitude and frequency. The latter factor depends on the crankshaft speed and the AC voltage output, crankshaft position, and battery voltage.
The Crankshaft Position Sensor has a reluctance wheel that attaches to the crankshaft. This wheel consists of 58 teeth and has a reference gap between each one. These teeth are spaced 6° apart with a 12° spacing for the reference gap. The reference gap pulse is known as the timing pulse, which is used to time the firing sequence of the coil with the crankshaft position. The rest of the teeth report the location of the cylinder during a revolution.
When the diagnostic code P1325 OBDII is set, it is because the ECM has detected 1 or 2 extra or missing teeth during a crankshaft revolution.
Reasons for setting the P1325 OBD2 fault code:
Steps to solve the P1325 OBDII DTC: