What are the possible causes of DTC P1321 Audi?
NOTE: The causes listed may not be a complete list of all potential issues, and there may be other causes.
- Faulty knock sensor 3
- Knock sensor 3 harness is open or shorted
- Poor electrical connection in the knock sensor 3 circuit
How to repair DTC P1321 Audi?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins. Search for P1321 Audi questions and answers:
What are the possible symptoms of Audi P1321 code?
- Engine light on (or service engine soon warning light)
What does Audi P1321 code mean?
The Engine Control Module (ECM) monitors the signal from knock sensor 3. The ECM sets the Diagnostic Trouble Code (DTC) when the signal from knock sensor 3 does not meet factory specifications.