P0325 Knock Sensor Circuit

SYMPTOM
P-0325 KNOCK SENSOR CIRCUIT

WHEN MONITORED
With the ignition on and the engine running.

SET CONDITION
The knock sensor circuit voltage falls below a minimum value at idle or deceleration. The minimum value is from a look-up table internal to the PCM and is based on engine rpm. The trouble code also sets if the sensor output is above 5.0 volts.

POSSIBLE CAUSES
- Knock sensor signal circuit shorted to ground
- Knock sensor signal circuit shorted to voltage
- Knock sensor defective
- Knock sensor ground circuit open
- Knock sensor signal circuit open