OBD-II Code · Sensors
P0330
Knock Sensor 2 Circuit (Bank 2)
Severity
medium
Worth booking. It costs fuel, emissions or comfort until it is fixed.
Can you drive it
Only if running normally
A short trip to a shop may be reasonable if the light is steady and the car runs normally. Stop safely for a flashing light, severe shaking, overheating, loss of power, or another urgent warning. The code alone cannot confirm safety.
Indicative cost (USD)
$150–$500
Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
Bank 2 knock sensor circuit fault.
How a shop works this
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.
Note every code that is set, not just this one.
Codes that appear together usually narrow the cause faster than any one of them read alone.
Read the freeze frame — the conditions the fault was recorded under.
Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.
Confirm the fault is current rather than history.
Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.
Then work the likely-causes list in the order shown.
That order is what a shop checks first for this code — wiring and connections before the component they run to, because a connector costs nothing to inspect and is a common answer.
If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.
Common symptoms
- Check engine light
- Pinging
Likely causes
- Failed sensorMost common
- Wiring
Read the full diagnostic procedureP0330 is the bank 2 mirror of P0325 - a generic circuit fault on knock sensor 2.
P0330 is the bank 2 mirror of P0325 - a generic circuit fault on knock sensor 2.
Same diagnostic ladder
- verify sensor resistance off the harness (piezo 4-5 megohms, resonant 90-110 kohm), verify the bias voltage on the signal wire with the connector unplugged, and tap-test the block near the sensor while watching live data.
- On V-engines, bank 2 is the bank that does NOT contain cylinder 1 - this matters because GM and Ford disagree on which side that is (GM bank 2 is passenger side on most LS trucks; Ford bank 2 is driver side on most modulars).
- Confirm the sensor location against the service info before pulling anything.
- On GM LS V8s, both knock sensors are in the lifter valley under the intake, so a P0330 on a 5.3L truck is the exact same root cause as P0325 - the harness, not the sensor.
- Caveat: on transverse V6 engines (GM 3.6L LFX, Honda J35) the rear-bank sensor is buried behind the intake and is frequently misdiagnosed because the front-bank sensor tests fine.
Vehicle-specific patterns1999-2007 GM 4.8/5.3/6.0 LS trucks set P0330 from the same under-intake harness corrosion as P0325 - both sensors share the harness path.
- 1999-2007GM 4.8/5.3/6.0 LS trucks set P0330 from the same under-intake harness corrosion as P0325 - both sensors share the harness path.
- 2005-2011GM 3.6L LFX/LY7 (CTS, Acadia, Traverse) has a known rear-bank knock sensor failure that requires upper intake removal.
- 2007-2013BMW N62 V8 has knock sensor harness failures on bank 2 under the intake.
- 2004-2010Toyota Tundra/Sequoia 4.7L 2UZ-FE has a TSB for knock sensor wiring degradation under the intake manifold.
Estimated repair$120 to $750.
Look up another code
P0330 — frequently asked
What does a P0330 code mean?
Bank 2 knock sensor circuit fault.
What causes a P0330 code?
Common causes: Failed sensor; Wiring.
What are the symptoms of a P0330 code?
Typical symptoms: Check engine light; Pinging.
Is it safe to drive with a P0330 code?
Only if running normally. A short trip to a shop may be reasonable if the light is steady and the car runs normally. Stop safely for a flashing light, severe shaking, overheating, loss of power, or another urgent warning. The code alone cannot confirm safety. Estimated repair: $150-$500.
How do I diagnose a P0330 code?
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed. 1. Note every code that is set, not just this one. 2. Read the freeze frame — the conditions the fault was recorded under. 3. Confirm the fault is current rather than history. 4. Then work the likely-causes list in the order shown.
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