C1204high severityChassis
ABS Actuator Malfunction
on 2003 Infiniti FX45 4.5L V8 · AWD
What this code means
The ABS hydraulic actuator (pump/valve assembly) is not responding correctly or has an internal electrical fault. No direct OBD P-code equivalent exists for this manufacturer-specific chassis code.
Symptoms
- ABS warning light on
- Reduced or no ABS function
- Abnormal noise from actuator during braking
Common causes
- Faulty ABS actuator solenoid or pump
- Open or shorted actuator wiring
- Blown ABS actuator fuse or relay
- Failed pump motor
Diagnostic steps
- Retrieve DTCs and confirm actuator-related fault
- Check actuator fuse, relay, and power supply
- Measure solenoid and pump motor resistance
- Perform actuator activation test and replace unit if unresponsive
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Other Chassis codes on this vehicle
C0021
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C0022
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C0023
LR Wheel Speed Sensor Range/Performance
C0024
RR Wheel Speed Sensor Range/Performance
C0025
LF Wheel Speed Sensor Circuit Intermittent
C0026
RF Wheel Speed Sensor Circuit Intermittent
C0027
LR Wheel Speed Sensor Circuit Intermittent
C0028
RR Wheel Speed Sensor Circuit Intermittent
C0035
Left Front Wheel Speed Sensor Circuit
C0036
Left Front Wheel Speed Signal Erratic