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P0330

Knock Sensor 2 Circuit Malfunction (Bank 2)

The computer is not getting the correct signal from knock sensor 2 on bank 2. This sensor helps protect the engine by reporting abnormal combustion vibration. The problem may be the sensor, the wiring, the connector, or a related circuit issue.

SEV
3/5
DRIVE
CAUTION
DIY
$20-$150
SHOP
$150-$600

Quick answer

AI-CITATION READY

What it means

P0330 means the PCM detected an electrical fault in the knock sensor 2 circuit on bank 2. The fault can be an open circuit, short, poor connector contact, damaged wiring, or a failed sensor. On some vehicles, severe engine vibration or real knock can also interfere with the signal, but this code usually starts as a circuit problem.

Can you drive with it?

With caution. You may be able to drive short distances, but timing control and engine protection may be reduced. If the engine pings, loses power, or runs rough under load, diagnose it soon to avoid possible engine damage.

Most common causes

  • Failed knock sensor 2 on bank 2
  • Damaged, corroded, or loose knock sensor connector on bank 2
  • Broken, rubbed-through, or shorted wiring in the knock sensor 2 circuit

Typical repair cost

DIY usually runs $20-$150. Typical shop repair lands around $150-$600, depending on the root cause.

01 / Definition

P0330 means the PCM detected an electrical fault in the knock sensor 2 circuit on bank 2. The fault can be an open circuit, short, poor connector contact, damaged wiring, or a failed sensor. On some vehicles, severe engine vibration or real knock can also interfere with the signal, but this code usually starts as a circuit problem.

02 / Drive status

With caution. You may be able to drive short distances, but timing control and engine protection may be reduced. If the engine pings, loses power, or runs rough under load, diagnose it soon to avoid possible engine damage.

03 / Symptoms

  • Check engine light on
  • Reduced engine power
  • Poor acceleration
  • Spark knock or pinging under load
  • Lower fuel economy
  • Timing may be retarded by the computer

04 / Causes

1Failed knock sensor 2 on bank 2high
2Damaged, corroded, or loose knock sensor connector on bank 2high
3Broken, rubbed-through, or shorted wiring in the knock sensor 2 circuithigh
4Incorrect sensor installed or wrong part numbermedium
5Excessive engine noise, detonation, or internal mechanical problem affecting the signalmedium
6PCM input or internal module issuelow

05 / Diagnostic sequence

  1. 01Check for other codes first, especially misfire, lean mixture, cooling-system, or timing-related faults.
  2. 02Inspect the bank 2 knock sensor 2 connector and wiring for damage, corrosion, oil intrusion, or loose pins.
  3. 03Verify the sensor is mounted correctly and that the correct sensor is installed on the correct bank.
  4. 04Test circuit continuity and check for shorts to power or ground in the harness.
  5. 05Use a scan tool to compare bank 1 and bank 2 knock-sensor behavior if the vehicle supports it.
  6. 06Check for real engine knock or abnormal mechanical noise such as low-octane fuel, overheating, carbon buildup, or internal engine problems.
  7. 07If wiring is good, test or replace the bank 2 knock sensor 2 and clear the code.
  8. 08If the code returns, check PCM inputs and manufacturer-specific circuit tests.

06 / Repairs

1Repair damaged wiring or clean and secure the bank 2 knock sensor connector$20-$150
2Replace the bank 2 knock sensor 2 and any damaged connector terminals$50-$250
3Correct causes of real knock such as low-grade fuel, overheating, or carbon buildup$10-$400
4Diagnose PCM circuit faults or replace the PCM if the external circuit checks good$200-$900

07 / Related codes

  • P0325
  • P0326
  • P0328
  • P0332
  • P0324
  • P0300

08 / FAQ

What does bank 2 mean on P0330?

Bank 2 is the side of the engine that does not contain cylinder 1.

Can P0330 cause loss of power?

Yes. Many vehicles reduce ignition timing when knock sensor data is unreliable, which lowers power and fuel economy.

Is P0330 always a bad sensor?

No. Wiring, connector, and circuit problems are common, and real engine noise can complicate the diagnosis.

09 / Source and method

DATA BASIS
OBD-II REFERENCE + OBD2.HELP
METHOD
STATIC VALIDATION
SAFETY
INFORMATIONAL

This page combines OBD-II diagnostic reference data with OBD2.help generated diagnostic guidance for code meaning, likely causes, and repair direction.

Publishing uses deterministic schema and build validation, plus manual spot checks on representative pages before release.

Safety-critical diagnosis and repairs should be confirmed with a qualified mechanic, especially when the vehicle is misfiring, overheating, or losing power.