C0203ABS Solenoid Valve Front Right Circuit
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- C0203 has no public trace: neither the accessible J2012 lists nor the NHTSA bulletins or maker indexes include it. Read literally it is the front right counterpart of C0200; Saab's 9-5 fitted with the Bosch 5.3 traction/ABS unit reports this case as C2455. GM's wording for the TRW EBC450 unit of the 2011 Saab 9-5 calls the two valves per wheel isolation and dump valves: the first closes to freeze pressure, the second opens to bleed it into the low-pressure accumulator, from which the pump returns the fluid, and the control module powers both coils itself. A Toyota/Denso patent describes the classic reaction to a broken or shorted coil: a fault flag is set, the warning lamp is latched and a cut-off relay is dropped so the car brakes like one without ABS.
- What you may notice
- ABS lamp on, anti-lock function off
- Front right wheel can lock under hard braking
- Likely causes
- LikelyOpen or shorted coil of a front right valve
- PossiblePoor contact between control module and valve block
- RareFaulty valve driver in the control module
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.