P0325Knock Sensor 1 Circuit Malfunction (Bank 1)
A general fault has been detected in the bank 1 knock sensor circuit. The ECU uses the knock sensor to detect pre-ignition and retards ignition timing when knock occurs; with no signal, the ECU runs conservative timing and loses power.
Can I keep driving? With caution
You can drive to the shop, but do not postpone the repair. The problem may worsen and damage other components.
Sistema Afectado
Sistema de Encendido · Bujías, bobinas y cilindros
El problema afecta la combustión en uno o más cilindros: bujías, bobinas o inyectores.
Espacio para vendedores de repuestos
Aún no hay un anunciante en este espacio.
Symptoms You Will Notice
What you may observe when this code appears
- Check engine light on Power loss from defensive spark retard Increased fuel consumption Possible audible pinging under load
Possible Causes
The components or conditions that trigger this code
- 1Knock sensor failed Sensor mounting bolt loose (sensor must be torqued correctly) Wiring fault
How to Fix It — Step by Step
Recommended diagnostic and repair procedure
- 1Difficulty: hard. Estimated time: 1.5-6 hours. Estimated cost: €200-€
- 2Professional repair recommended
Note: This information is for general reference. For precise diagnostics and safety repairs, always consult a certified mechanic.
Estimated Cost
Approximate range in USD (varies by region and shop)
Spark plugs + coils
* Diagnosis only: $50–$150
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