P0332 Knock Sensor 2 Circuit Low Input (Bank 2)

P0332 indicates a low input condition in Knock Sensor 2 circuit on Bank 2. The controller is seeing less signal or voltage than expected from the Bank 2 knock sensor path.

Code details

Generic OBD-II · P0

System: Ignition / Misfire
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not ignore P0332 if timing correction is disabled or reduced; the engine may lose detonation protection on Bank 2.

Symptoms of P0332

Rough idle, shaking, or a stumble under acceleration.
A flashing check-engine light during an active misfire.
Power loss and higher fuel consumption.

Common causes of P0332

Worn spark plugs, ignition coils, or plug wires.
Fuel-delivery problems — injectors, pressure, or a lean/rich mixture.
Vacuum leaks, low compression, or a mechanical fault in that cylinder.

Useful checks before replacing parts

Check Knock Sensor 2 voltage or signal level, sensor ground, connector condition, wiring continuity, and freeze-frame conditions.
Inspect for short-to-ground faults, water intrusion, crushed harness sections, loose sensor mounting, corrosion, and sensor or module input issues.
Compare KOEO and running signal behavior against Bank 1 where available to identify whether Bank 2 is electrically biased low.

Related OBD-II codes

These nearby ignition / misfire entries can help compare wording and pin down the fault area.