What does code P1325 mean?

Q: What does code P1325 mean?

Cylinder 1 Knock Control Limit Attained. P1325 on a Volkswagen means the engine control module has detected that cylinder 1 is knocking hard enough to reach the limit of its knock control authority, so it can no longer retard timing enough to suppress the knock. The computer is seeing persistent knock sensor activity on cylinder 1 that exceeds the programmed threshold, which usually points to a mechanical, fuel, or sensor issue rather than normal combustion noise.

DTC codes / Volkswagen codes / P1325

P1325 · VolkswagenCylinder 1 Knock Control Limit Attained

P1325 on a Volkswagen means the engine control module has detected that cylinder 1 is knocking hard enough to reach the limit of its knock control authority, so it can no longer retard timing enough to suppress the knock. The computer is seeing persistent knock sensor activity on cylinder 1 that exceeds the programmed threshold, which usually points to a mechanical, fuel, or sensor issue rather than normal combustion noise.

SystemPowertrain

Code typeVolkswagen specific

SeverityMedium

Fix difficultyIntermediate

AreaIgnition system and misfire

Guidance is general and written for Volkswagen vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.