C0023moderate severityChassis
LR Wheel Speed Sensor Range/Performance
on 2009 GMC Envoy 4.2L I6 · RWD
What this code means
The left rear wheel speed sensor output is outside expected parameters for current vehicle speed.
Symptoms
- ABS light on
- Rear ABS only partially functional
- Stability control warning
Common causes
- Sensor contaminated with debris
- Tone ring runout
- Damaged sensor tip
- Axle bearing wear
Diagnostic steps
- Compare rear sensor speeds at steady cruise
- Inspect sensor for metallic debris buildup
- Measure tone ring runout with dial indicator
- Check axle bearing
- Test sensor output voltage
Repair notes
Clean sensor and tone ring. Replace sensor if output is weak.
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Other Chassis codes on this vehicle
C0021
LF Wheel Speed Sensor Range/Performance
C0021
LF Wheel Speed Sensor Range/Performance
C0022
RF Wheel Speed Sensor Range/Performance
C0022
RF Wheel Speed Sensor Range/Performance
C0024
RR Wheel Speed Sensor Range/Performance
C0024
RR Wheel Speed Sensor Range/Performance
C0025
LF Wheel Speed Sensor Circuit Intermittent
C0025
LF Wheel Speed Sensor Circuit Intermittent
C0026
RF Wheel Speed Sensor Circuit Intermittent
C0026
RF Wheel Speed Sensor Circuit Intermittent