C0506Right Front Wheel Speed Sensor A Circuit/Open
- Generic OBD-II code · Chassis
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- C0506 reports an open or grounded circuit at the right front wheel speed sensor. GM's 2023 tables describe it as a grounded or interrupted line, recognized from the signal-line current: below 3.8 mA for 0.12 s, Type A, and only evaluated after the start-up sensor test has finished without a supply undervoltage. On GM's 2019 platform an open drawing under 3.5 mA is filed as C0508 instead, so the same broken wire can carry different numbers. Mitsubishi assigns C1063-13 to C0506 and warns not to replace the ABS unit for a code that is stored but not active; it may simply mean the car was not driven after the last repair. HELLA advises checking supply voltage and wiring with a multimeter, as the internal resistance of active sensors cannot be measured.
- What you may notice
- ABS, ESC and traction control lamps on from start-up
- Right front wheel speed reads zero in live data
- Likely causes
- LikelyBroken wire or open contact between ABS module and right front sensor
- PossibleRight front sensor failed open
- RareOld stored code after repair, vehicle not yet driven
- Repair
- Medium · Often possible to do yourself.Typical cost: €30 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.