C1109moderate severityChassis
Battery Voltage Abnormal (Power Supply)
on 2005 Infiniti FX45 4.5L V8 · AWD
What this code means
The ABS control unit detected battery voltage outside its normal operating range. No direct OBD P-code equivalent exists for this manufacturer-specific code.
Symptoms
- ABS warning light on
- Intermittent ABS operation
- Traction control off
Common causes
- Weak or failing battery
- Faulty alternator
- Corroded battery terminals
- Poor ground connection
Diagnostic steps
- Test battery voltage
- Check charging system output
- Inspect battery terminals
- Verify ABS power and ground
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Other Chassis codes on this vehicle
C0021
LF Wheel Speed Sensor Range/Performance
C0022
RF Wheel Speed Sensor Range/Performance
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