C050ARight Front Wheel Speed Sensor A Intermittent/Erratic
- 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
- C050A is the erratic-signal code for the right front sensor. GM's 2019 tables show how this is judged: an unfiltered wheel acceleration above 491 m/s² feeds a counter that latches the fault at 40 s and decays again on clean readings, so only persistently unrealistic jumps set it; a separate check trips when the edge count exceeds 55 (25 ms). Listed causes are a loosely mounted sensor, missing tone-ring teeth and electromagnetic interference. GM preliminary information PIT5707 for 2020 Silverado and Sierra HD trucks found metal debris on the front reluctor ring; its labor time for removing the hub and cleaning is 1.1 h. HELLA adds heavy dirt and increased bearing play as typical sensor faults. Mitsubishi assigns C1063-38 to C050A with a two-trip MIL.
- What you may notice
- ABS lamp and stability system message that appear and disappear
- Pulsing brake pedal or ABS action at low speed without wheel lock
- Likely causes
- LikelyMetal debris or heavy dirt on the right front reluctor ring
- PossibleMissing tone-ring teeth or excessive wheel bearing play
- RareElectromagnetic interference or intermittent contact in the harness
- Repair
- Medium · Often possible to do yourself.Typical cost: €0 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.