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