C0554Longitudinal Acceleration Sensor Circuit High
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- C0554 is the upper counterpart of C0553: the fore-aft acceleration voltage stays above the highest value that a real sensor reading may take. With a mid-scale zero point, as in a Hyundai/Kia G-sensor patent (2.5 V on a 5 V supply), a value pinned near the reference voltage would mean an absurd, constant acceleration, so the module treats it as a circuit fault. Typical reasons are a signal wire touching a supply line, moisture bridging pins in the plug, or an internal sensor defect; Bosch also names supply fluctuations among the disturbances its check has to catch. No public manufacturer text covers C0554. The module drops the signal, suspends stability and related assist functions and lights the ESC/ABS lamp, while normal braking stays available. C0551 is an open line, C0552 a plausible-looking but wrong value.
- What you may notice
- ESC and ABS warning lamps on
- Traction and stability assistance switched off
- Likely causes
- LikelySignal wire shorted to a supply voltage
- PossibleMoisture or corrosion bridging pins in the sensor connector
- RareSensor output stage failed at the upper end
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.