P033D-22: Knock Sensor 4 Circuit High (Bank 2) - Signal amplitude > maximum: Action
- Refer to the applicable SYSTEM WIRING DIAGRAM(S) and check knock sensor circuit for short circuit to power
- Measure knock sensor circuit for correct resistance
- Inspect connectors for signs of water ingress, and pins for damage and/or corrosion
- Check for abnormal engine noise that may corrupt the knock sensor signal
- Using the manufacturer approved diagnostic system clear all stored DTCs using the `Diagnosis Menu' tab and retest
- Check and install a new knock sensor as required