C1121moderate severityChassis
Front Right Wheel Speed Sensor Fault
on 2020 Subaru Legacy 2.5L H4 · AWD
What this code means
A fault is detected in the front right ABS wheel speed sensor or circuit. Equivalent to generic OBD code C0035.
Symptoms
- ABS warning light on
- Traction control disabled
- Erratic speedometer possible
Common causes
- Failed FR wheel speed sensor
- Damaged sensor wiring
- Dirty or damaged tone ring
- Corroded connector
Diagnostic steps
- Check FR sensor resistance
- Inspect sensor and tone ring
- Test wiring continuity
- Replace sensor if faulty
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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