C0303Inlet Valve Front Right Performance
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- C0303 has no public evidence at all: the accessible J2012 lists, GM's PIP5094 keyword list, AA1Car's GM table and the NHTSA index all lack it. The title points to the front right inlet valve. A performance fault here means the brake module saw the valve respond wrongly, for example a coil current out of range during the self-test or a wheel that does not hold pressure as commanded. In the Saab 9-5 ESP valve block twelve solenoid valves sit together, including an inlet/outlet pair for every wheel, and any valve fault switches ABS, traction and stability control off and lights their lamps. A front right inlet valve that stays shut leaves that wheel underbraked, so the car may pull to the left; one that will not close lets the wheel lock in ABS braking.
- What you may notice
- ABS, traction and stability control lamps on
- Car pulls to the left when braking
- Likely causes
- PossibleInlet valve stuck from debris after brake work
- PossibleOpen or shorted valve coil inside the hydraulic unit
- RareLow supply voltage to the valve circuit during self-test
- Repair
- Hard · Usually a job for a workshop.Typical cost: €150 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.