C0553Longitudinal Acceleration Sensor Circuit Low
- Generic OBD-II code · Chassis
- Can trigger limp mode
- How the car detects it
- C0553 is stored when the longitudinal acceleration signal sits below the lowest voltage the module accepts. Analog acceleration sensors idle at mid-scale; a Hyundai/Kia patent gives 2.5 V as the zero point of a G-sensor on a 5 V reference, so a level dragged toward 0 V cannot come from real braking but points to the wiring: signal shorted to ground, missing sensor supply, or a sensor whose output stage has failed. The same patent has the controller check the sensor at ignition-on and switch to a fallback mode with a warning on failure. No manufacturer publishes C0553 itself. As with the open circuit, stability and related assist functions drop out and the ESC/ABS lamp lights, base brakes keep working. C0554 is the opposite case, C0551 an open line.
- What you may notice
- ESC and ABS warning lamps on from start-up
- Stability control and hill-hold unavailable
- Likely causes
- LikelySignal wire chafed through and shorted to ground
- PossibleSensor reference supply missing or collapsed
- RareSensor output stage failed at the lower 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.