P0330
Knock Sensor 2 Circuit (Bank 2)
A general electrical fault in the bank 2 knock sensor circuit. The ECU monitors a piezoelectric sensor for engine vibration patterns associated with detonation; an open, shorted, or out-of-range circuit triggers this code.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: hard
Symptoms
- Check engine light on
- Power loss from defensive spark retard
- Increased fuel consumption
- Possible audible pinging under load
Common causes
Ordered by how often each turns out to be the cause.
- Knock sensor failedCommon
- Wiring/connector faultPossible
Parts involved
- Knock Sensor
- Sensor Wiring
P0330 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.