C050DLeft Rear Wheel Speed Sensor A Range/Performance
- 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
- C050D says the left rear signal exists but is not trustworthy. In GM's 23OBDG07 tables several checks share this code: a weak magnetic flux under 2.2 mT across at least five wheel turns (detected after 8 s at 3.1 mph or 22 s at 1.24 mph), missing standstill pulses for 3.6 s, and an undervoltage on the sensor supply; all are Type B with two trips, and the tables list Bosch, Continental and DF11i sensor variants. GM's 2019 tables add a grey-zone current between 7 and 28 mA for 750 ms. Stellantis lists C050D as a left rear plausibility error in PCM reflash bulletins such as 18-075-20 for the 2018 Jeep Compass. Mitsubishi files C1065-92 as C050D and points to tire size and the sensor rotor.
- What you may notice
- ABS and stability lamps come on only after some driving
- Stability or traction control intervenes without reason at low speed
- Code may be stored without a lit MIL on some Stellantis models
- Likely causes
- LikelyAir gap to the rear encoder too large (sensor not seated, worn or loose hub bearing)
- PossibleContact resistance or leakage in the rear sensor wiring
- PossibleLeft rear tire differs in rolling circumference
- RareControl module software sets the code falsely (Stellantis reflash)
- Repair
- Medium · 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.