Troubleshooting

DTC P0325 Knock Sensor 1 Circuit (Bank 1 or Single Sensor)

CIRCUIT DESCRIPTION

DTC Detecting Condition:

Each knock sensor is fitted to the right bank and left bank of the cylinder block to detect engine knocking. This sensor contains a piezoelectric element which generates a voltage when it becomes deformed. The piezoelectric element sends a signal to the ECM, when the cylinder block vibrates due to knocking. If engine knocking occurs ignition timing is retarded to suppress it.

Wiring Diagram:

Step 1:

Step 1 (Continued) - 2:

Step 3:

INSPECTION PROCEDURE

HINT:
- DTC P0325 is for the left bank knock sensor circuit.
- DTC P0330 is for the right bank knock sensor circuit.
- Read freeze frame data using hand-held tester or the OBD II scan tool, as freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, this is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air-fuel ratio was lean or rich, etc. at the time of the malfunction.