Code P1328 – Knock Control Limit for Cylinder 4 Reached

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What are the possible causes of DTC P1328?

NOTE: The listed causes may not be a complete list of all potential issues, and there could be other causes.

  • Low fuel level or poor fuel quality
  • Faulty Mass Air Flow (MAF) sensor
  • Low fuel pressure
  • Abnormal engine noise or faulty knock sensor
  • Defective knock sensor
  • Knock sensor wiring harness is open or short-circuited
  • Poor electrical connection in the knock sensor circuit

How to repair DTC P1328?

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.

What are the possible symptoms of code P1328?

  • Check Engine Light on (or soon-to-be-on Engine Maintenance Warning Light)

What does code P1328 mean?

The Engine Control Module (ECM) monitors the knock sensor. The ECM sets the OBDII code when the knock sensor does not meet factory specifications.

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