C0511Left Rear 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
- C0511 means the left rear speed does not match what the other three wheels report. In GM's 19OBDG03D tables four monitors feed it: missing sensor (this wheel below 1.5 km/h while the rest exceed 6 km/h, 3 to 120 s), dropout (no edges for 150 ms after a valid reading above 30 km/h, with thresholds that depend on axle and brake pedal), fast missing (counted from key-on until 15 km/h is first reached) and too fast (this wheel faster than 6 km/h with the others standing, 40 ms). All are Type A. Mitsubishi calls C1065-64 its C0511 and blames a wrong tire size, checked between 10 and 60 km/h. GM bulletin PIT5950 for the 2019–2023 Silverado 1500 lists C0511 among codes that keep returning after a front sensor of the wrong side was fitted.
- What you may notice
- ABS and stability lamps on after setting off or at moderate speed
- Speedometer and driver aids act up after a tire change
- Likely causes
- LikelyLeft rear tire of a different size or heavily worn compared with the others
- PossibleDemagnetized encoder or damaged tone ring at the left rear
- PossibleWrong sensor fitted after a repair (GM PIT5950)
- Repair
- Easy · Often possible to do yourself.Typical cost: €0 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.