C0557Left Rear Wheel Speed Sensor A Incorrect Component Installed
- 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
- C0557 concerns the speed sensor at the left rear wheel: its signal exists, but the ABS module judges the fitted part as not matching. Mitsubishi lists C1065-4A on the 2023 Outlander PHEV as C0557 (sensor in the wrong position, up to 3 s, MIL after two trips). Ford reports the same fault type with its base code plus failure byte, C0037:4A. On 2025 Bronco and Ranger, special service messages 53875 and 53988 (plus their Ranger counterparts) show it together with C003A:4A at start-up as an ABS software issue; replacing sensors or the module does not help, the fix is reprogramming the ABS module. So before buying a sensor, compare part numbers and look for software bulletins. Unlike C050C (circuit open) or C0510 (erratic), the wiring is usually fine here.
- What you may notice
- Several brake system warnings at start-up
- ABS and stability control unavailable
- Check-engine lamp on some models
- Likely causes
- LikelyWrong or other-side sensor fitted at the left rear
- PossibleABS module software misjudges the sensor (fixed by reprogramming)
- RareRear sensor connectors swapped left and right
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.