P0333
Knock Sensor 2 Circuit High Input (Bank 2)
The bank 2 knock sensor signal is above the expected voltage range. Typically caused by a short to supply voltage or an internal sensor fault.
- 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.
- Signal wire shorted to supplyCommon
- Knock sensor failedPossible
- Connector pins corroded - high contact resistanceLess likely
Parts involved
- Knock Sensor
- Sensor Wiring
P0333 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.