What does code P0325 mean?

P0325 — Knock Sensor 1 circuit malfunction (Bank 1). Sensor isn't reporting — engine can't retard timing on detonation, risking serious damage. Belongs to the powertrain.knock system. Severity: warning.

What are the common causes of P0325?

Damaged sensor wiring — thin coax easily broken; Corroded sensor connector; Failed knock sensor (common failure with age); Improperly torqued sensor — can't 'hear' vibrations; Shorted coax shield

Can I drive with code P0325?

Limited: reaching the nearest workshop is fine, but avoid long trips. May progress into a more serious fault.

How do I diagnose P0325?

Read the code and freeze-frame with a scanner, check related-system errors, inspect the components listed (wiring, connectors, sensors). See the "How to diagnose" section above for the full step-by-step.

How do I clear code P0325?

The code can be cleared via an OBD-II scanner (e.g. ELM327 + the Car Diagnostics app): plug the adapter into the OBD port, go to Errors → Clear. If the underlying cause isn't fixed, the code will return within a few drive cycles.

OBD-II Code P0325 — Car Diagnostics Platform

What it means

Common causes

Damaged sensor wiring — thin coax easily broken
Corroded sensor connector
Failed knock sensor (common failure with age)
Improperly torqued sensor — can't 'hear' vibrations
Shorted coax shield
ECM failure — rare but possible after water damage

How to diagnose

01
Read all stored and pending codes with an OBD-II adapter — get the full picture, not just the one code.
02
Capture freeze-frame data (RPM, coolant temperature, engine load) at the exact moment the code triggered.
03
Inspect the named subsystem with our app's AI explanation — get vehicle-specific causes for your make, model and year.

Decode P0325 on your actual car

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