P0325moderate severityPowertrain
Knock Sensor 1 Circuit Bank 1
on 2007 Mercedes-Benz S65 AMG 6.0L V12 BiTurbo M275 · RWD
What this code means
Malfunction in the knock sensor 1 circuit for Bank 1. The knock sensor detects engine detonation/pinging and allows the PCM to retard timing.
Symptoms
- Check Engine Light
- Reduced power (timing retarded)
- Possible pinging/knocking
- Poor fuel economy
Common causes
- Faulty knock sensor
- Wiring damage
- Incorrect torque on sensor
- PCM failure
- Engine noise masking knock signal
Diagnostic steps
- Test knock sensor resistance
- Inspect wiring and connector
- Check sensor mounting torque
- Monitor knock signal with scan tool
Repair notes
Replace knock sensor. Torque to spec (important). Use correct sensor for application.
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Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1