P033C OBD II Trouble Code Knock Sensor 4 Circuit Low (Bank 2)

Symptoms of P033C OBD II Trouble Code

  • Hesitation when accelerating
  • Below normal engine performance
  • Abnormal noises from the engine area
  • Increased fuel consumption

Common Causes of P033C OBD II Trouble Code

  • Ignition misfire
  • Faulty knock sensor
  • Internal engine problem
  • Contaminated or subpar fuel used
  • Defective knock sensor control wiring and/or connectors
  • Bad PCM or a PCM programing error

Severity of P033C OBD II Trouble Code

If the PCM detects a degree of knock sensor voltage indicative of a spark detonation; it may retard ignition timing and no knock sensor control code may be stored. If the PCM detects a level of knock sensor voltage that indicates a more severe engine noise (such as a connecting rod contacting the inside of the engine block), it may discontinue fuel delivery and ignition spark to the affected cylinder and a knock sensor code will be stored.