Ignition & misfire · Powertrain · generic (SAE-defined)
P0332: Knock Sensor 2 Circuit Low (Bank 2)
P0332 means the bank 2 knock sensor signal is lower than the engine computer expects, usually from an open circuit, a grounded wire, or a poorly mounted sensor.
Standard title per SAE J2012 / ISO 15031-6 · Updated 2026-11-07 · By CarWhere Research
How P0332 sets
The powertrain control module (PCM) expects a minimum signal level from the bank 2 knock sensor during normal operation. If the signal stays below that level for a calibrated period, P0332 sets. Values are manufacturer-specific.
Common causes of P0332
Roughly most likely first; the actual cause depends on the vehicle and needs testing to confirm.
- Open or grounded wiring to the bank 2 knock sensor
- Loose or incorrectly torqued sensor
- Failed bank 2 knock sensor
- Corroded connector terminals
- Damaged harness from heat or rodents
P0332 symptoms
- Check engine light on
- Slight hesitation or loss of power
- Reduced fuel economy
- Often no noticeable symptoms
How P0332 is diagnosed
- Check freeze frame data and related knock sensor codes.
- Inspect wiring and connector for the bank 2 sensor.
- Check signal wire continuity to the PCM and test for shorts to ground.
- Verify sensor mounting torque.
- Measure sensor resistance or output according to service information.
Typical fixes for P0332
- Repair open or shorted wiring
- Tighten the sensor to specification
- Replace the bank 2 knock sensor
- Replace the harness if damaged
Replace parts only after testing confirms the cause — a code names the circuit or condition that failed a check, not necessarily the faulty part. We don’t publish per-repair prices; for what households actually spend on upkeep, see car repair costs.
Related codes & warning lights
P0332 FAQ
What does code P0332 mean?
P0332 means the bank 2 knock sensor signal is lower than the engine computer expects, usually from an open circuit, a grounded wire, or a poorly mounted sensor. The standard definition is "Knock Sensor 2 Circuit Low (Bank 2)."
Can I drive with a P0332 code?
Usually yes. Expect possible timing retard and slightly reduced power, and plan to diagnose it soon rather than ignoring it.
Why do P0327 and P0332 often appear together?
When both bank knock sensors read low, a shared harness, connector, or ground is more likely than two failed sensors at once.
Can rodents cause P0332?
Yes. Rodent damage to wiring under the intake or along the engine harness can open the knock sensor circuit.
Does the engine need to be warm for P0332 to set?
Often, yes. Many systems only run the knock sensor circuit check under certain temperature, rpm, and load conditions, so the code may take a drive cycle to return after clearing.
Keep researching
Engine guides by brand (known issues, specs)
More ignition & misfire codes
Sources
- SAE J2012 — Diagnostic Trouble Code Definitions (standard code titles)
- ISO 15031-6 — Road vehicles: communication between vehicle and external equipment for emissions-related diagnostics, Part 6: Diagnostic trouble code definitions
- U.S. EPA — Vehicle Emissions Inspection and Maintenance (I/M) programs
- U.S. EPA, 40 CFR 86.1806-17 — Federal onboard diagnostics requirements for light-duty vehicles
General information written by CarWhere Research, not a diagnosis of your vehicle. Manufacturers can add their own sub-definitions and test conditions; confirm with the factory service information for your year, make and model. Before paying for a repair, check NHTSA for open recalls and your warranty booklet: federal law requires an emissions warranty on major emission-control parts such as the catalytic converter and engine computer.