C050BRight Front Wheel Speed Sensor A Correlation
- Generic OBD-II code · Chassis
- Turns on the check-engine light
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- C050B is the correlation code for the right front wheel. GM's 2025 tables (25OBDG04A) rate it Type B, so the MIL waits for a second trip, and add a check not found under C0505 in the 2019 tables: the brake module compares the switching state it requests from the sensor supply driver with the state reported back, an internal module fault rather than a sensor problem. The plausibility checks stay: from start-up to 15 km/h a wheel below 1.2 km/h counts as missing, and if only this wheel exceeds 6 km/h while another stays under 1.5 km/h, a 40 s wait precedes storing the fault. Mitsubishi lists C1063-64 as C050B, naming tire size and sensor rotor. Bosch's active sensors resolve speed down to about 0.1 km/h, so a dead channel shows up early.
- What you may notice
- ABS/ESC lamps after the second drive with the fault
- Stability and traction control unavailable, normal braking retained
- Likely causes
- LikelyRight front tire of a different size or circumference
- PossibleSensor-to-ring gap out of tolerance or demagnetized encoder
- RareInternal fault in the ABS module's sensor supply switch (GM)
- Repair
- Easy · Often possible to do yourself.Typical cost: €0 – €450
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.