Error code

OBD2 P0334

OBD2P0334
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Knock Sensor 2 Circuit Input Intermittent.

Severity

moderateCan drive, but performance issues may occur.

Summary

P0334 indicates an issue with Knock Sensor 2 on bank 2 of your engine, which is used to detect spark knock and adjust ignition timing accordingly.

Symptoms

  • Lack of power
  • Engine hesitation
  • Pinging or knocking sounds

Common Causes

  • Failed knock sensor
  • Fault in the knock sensor circuit
  • PCM failure

Diagnosis

  1. Visually inspect the sensor and connection.
  2. Perform a basic test of the knock sensor using a timing light or scan tool.
  3. Test the sensor output with a multimeter to check for AC voltage when tapping near the sensor.
  4. Check the circuit continuity between the sensor and PCM.

Fixes

  • Replace the faulty knock sensor if it is determined to be bad.

FAQ

What does P0334 mean?

P0334 indicates an issue with Knock Sensor 2 on bank 2 of your engine, which detects spark knock and adjusts ignition timing.

How do I diagnose P0334?

Diagnose by visually inspecting the sensor, performing a basic test using a timing light or scan tool, testing output with a multimeter, and checking circuit continuity between the sensor and PCM.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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