P0332

Knock/Combustion Vibration Sensor B Circuit Low

Q: Is it safe to drive with P0332?

Yes, for normal driving. The ECM protects the engine by retarding timing, so you lose a little power. Fix it before extended high-load driving to prevent knock damage.

Q: Can I just clear P0332?

It comes back while the circuit still reads low. Repair the wiring or replace the sensor first, then clear and re-test.

Ignition / knock control Generic OBD-II Medium

What it means

P0332 means the second (bank 2) knock sensor's circuit is reading below its normal voltage range, usually from a failed sensor or a wiring short to ground. Without a trustworthy knock signal, the ECM often retards ignition timing as a safeguard, which slightly reduces power and economy until the sensor or wiring is repaired.

Medium

Can I keep driving? Driveable. The ECM may retard timing as a precaution, so expect slightly less power and economy until the bank 2 knock sensor is fixed.

Real-world scan data

Seen in

223

scans in the past year

Found in

<0.1%

of scans

0.1%

of scans that found faults

Appears alongside · share of P0332 scans

P0327in 39.0% of scans

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
Slightly reduced power or fuel economy
Possible pinging or knock under load
Minor hesitation in some cases

Common causes

Most likely first

Failed knock sensor B (bank 2) with low outputLikely
Wiring shorted to ground in the sensor circuitCommon
Open or high-resistance connection at the connectorCommon
Corroded or loose electrical terminalsLess often
Failed ECM (rare)Less often

How to diagnose & fix

Work through it in order

Read freeze-frame data and check for related knock-sensor codes.
Inspect the bank 2 knock sensor connector and wiring for a short to ground or corrosion.
Measure the sensor's resistance and signal voltage against spec.
Confirm correct sensor mounting and torque — a loose sensor can read low.
Replace the knock sensor if out of range. Clear and re-test.

FAQ

Quick answers

Is it safe to drive with P0332?+

Yes, for normal driving. The ECM protects the engine by retarding timing, so you lose a little power. Fix it before extended high-load driving to prevent knock damage.

Can I just clear P0332?+

It comes back while the circuit still reads low. Repair the wiring or replace the sensor first, then clear and re-test.

Read & clear P0332 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX