P0325 — Knock Sensor 1 Circuit Malfunction (Bank 1 or Single Sensor)
Category: Powertrain Severity: Medium
Updated:
DTC code P0325 means: Knock Sensor 1 Circuit Malfunction (Bank 1 or Single Sensor). It falls under the "Powertrain" category, with an estimated severity of Medium. Common causes include faulty knock sensor, wiring/connector issue and engine mechanical noise; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Faulty knock sensor
- Wiring/connector issue
- Engine mechanical noise
- Incorrect fuel octane
Symptoms
- Engine vibration
- Loss of power
- Higher fuel consumption
- Engine may not start
How to diagnose it step by step
- Check the knock sensor connector.
- Check mounting torque.
- Measure resistance.
- Replace the sensor.
How to fix it
Check spark plugs, coils and position sensors (crankshaft/camshaft); replace any faulty part.
Estimated repair cost
$100–400 installed.
Frequently asked questions
What does DTC code P0325 mean?
Knock Sensor 1 Circuit Malfunction (Bank 1 or Single Sensor).
Is code P0325 serious?
Severity Medium. Not urgent, but worth diagnosing to avoid bigger damage.
Can I keep driving with code P0325?
Yes, carefully.
Related codes
P0327 P0328 P0320 P0332 P0316 P0335 P0336 P0340 P0341 P0308
Refine by car make
- Audi P0325: Knock sensor or connector.
- BMW P0325: Knock sensor.
- Citroën P0325: Spark plugs, coils, or position sensor.
- Dacia P0325: Spark plugs or coils.
- Fiat P0325: Spark plugs or coils.
- Ford P0325: Knock sensor or wiring.
- Honda P0325: Spark plugs, coils, or position sensor.
- Hyundai P0325: Coils or spark plugs.
- Kia P0325: Coils or spark plugs.
- Mazda P0325: Coils or spark plugs.
- Mercedes-Benz P0325: Spark plugs, coils, or position sensor.
- Nissan P0325: Coils, spark plugs, or position sensor.
- Opel P0325: Knock sensor.
- Peugeot P0325: Spark plugs, coils, or position sensor.
- Renault P0325: Knock sensor.
- Toyota P0325: Knock sensor.
- Volkswagen P0325: Knock sensor or its connector.
- Volvo P0325: Coils or spark plugs.
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