C0026moderate severityChassis
RF Wheel Speed Sensor Circuit Intermittent
on 2003 Buick Century 3.1L V6 · FWD
What this code means
The right front wheel speed sensor signal drops out intermittently.
Symptoms
- Intermittent ABS light
- Sporadic traction control engagement
- ABS function unpredictable
Common causes
- Wiring flexing near steering knuckle
- Connector corrosion
- Sensor loosening over time
- Harness chafing on suspension
Diagnostic steps
- Wiggle test at connector and along harness
- Check connector pin tension
- Verify sensor mounting torque
- Monitor live data during road test
Repair notes
Repair chafed wiring or replace connector. Secure sensor mounting.
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
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
C0040
Right Front Wheel Speed Sensor Circuit