OBD-II code · Chassis
C0081 Wheel Speed Mismatch (Rear Axle)
Rear axle wheel speeds differ beyond the plausibility threshold. Wheel-speed signals feed ABS, ESC, traction control, transmission and odometer — a single dropped signal disables all of these safety functions until repaired.
Is it safe to drive with C0081?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyTyre size mismatch
- PossibleSensor drift
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Wheel Speed Sensor Rl, Wheel Speed Sensor Rr, Tyres
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.