C053FBrake Pressure Sensor A Circuit High
- Generic OBD-II code · Chassis
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- Brake pressure sensor A reports a voltage above the upper limit of its valid band. Since the sensor is fed with 5 V, a short of the signal line to the reference or to battery voltage, a broken ground wire or an internal fault can push the reading up; a Saab 9-5 brake unit draws the line at 4.75 V lasting 0.1 s. GM-built Saab 9-5 models from 2011 check both the 5-V reference and the signal wire of the pressure sensor, which sits in the brake modulator valve block, and then disable ABS, traction and stability control for the ignition cycle. The only public code mapping comes from Mitsubishi: C106C-17 equals C053F on the 2023 Outlander PHEV, with ASC lamp and MIL after two trips and a detection delay of a second at most. C053E is the opposite fault.
- What you may notice
- ABS and stability control warning lamps on
- Traction control, stability control and hill-start assist unavailable
- Check-engine lamp on some hybrids
- Likely causes
- LikelySignal wire shorted to the 5-V reference or battery voltage
- PossibleOpen or corroded sensor ground
- PossiblePressure sensor in the hydraulic unit defective
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.