P0326 OBD II Trouble Code Knock Sensor 1 Circuit Range/Performance Bank 1

Detailed information on troubleshooting and repairing a P0326 DTC code which has to do with range performance problem on the bank 1 knock sensor circuit. Also includes links to relevant forum topics on the code.

Symptoms of P0326 OBD II Trouble Code

  • MIL (Malfunction Indicator Lamp) illumination
  • Audible knocking from the engine compartment
  • Pinging from engine under acceleration

Common Causes of P0326 OBD II Trouble Code

  • Knock sensor connector is damaged
  • Knock sensor circuit is open or shorted to ground
  • Knock sensor circuit is shorted to voltage
  • Knock sensor has failed
  • Moisture in knock sensor connectors
  • Incorrect fuel octane
  • PCM has failed

Severity of P0326 OBD II Trouble Code

If the PCM determines that the knock is out of the ordinary or that the noise level is abnormally high, P0326 may set. If the PCM senses that the knock is severe and cannot be eliminated by retarding the spark timing, P0326 may set. Keep in mind that knock sensors cannot distinguish between a knock from pre-detonation or one from engine problems.