DTC P0325: Knock Sensor Circuit Malfunction: General Description
The knock sensor is mounted on the engine block and detects engine knocking. The vibrations caused by the knocking are converted into electrical signals through the piezo ceramic element. The engine control module (ECM) controls the ignition timing based on the electrical signals. If the signals from the knock sensor do not vary for a set time, the ECM detects a malfunction and stores a DTC.
MONITOR EXECUTION, SEQUENCE, DURATION, DTC TYPE, OBD STATUS
| Execution | Continuous |
| Sequence | None |
| Duration | 5 seconds or more |
| DTC Type | One drive cycle, MIL ON |
| OBD Status | PASSED/FAILED/NOT COMPLETED (STILL TESTING) |
ENABLE CONDITIONS CHART
| Condition | Minimum | Maximum |
|---|---|---|
| Engine coolant temperature | 140°F (60°C) | - |
| Engine speed | 2,000 rpm | - |
| No active DTCs | P0112, P0113, P0117, P0118, P0335, P0339, P0340, P0341, P0344, P0365, P0369 P0606, P2646, P2647, P2648, P2649 | |