DTC EFI-433

1-4-3 FRONT KNOCK SENSOR, SIGNAL; 4-3-3 REAR KNOCK SENSOR, SIGNAL





Trouble Code Conditions
- If engine temperature exceeds +40°C, engine speed exceeds 2,500 rpm, load exceeds 3.0 ms and the signal from the knock sensor (KS) is missing for 4 seconds the diagnostic trouble code (DTC) for that knock sensor is posted.

Substitute value(s)
- Knock control is disabled.
- Ignition advance reduced for safety reasons.

Possible source(s)
- Short-circuit to ground in signal cable.
- Open-circuit in signal or ground cable.
- Contact resistance in terminals.
- Defective knock sensor.

Fault symptom(s)
- Poor performance due to retarded ignition.