Chassis, generic

C0554 Longitudinal Acceleration Sensor Circuit High

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Signal wire shorted to a supply voltage
Moisture or corrosion bridging pins in the sensor connector
Sensor output stage failed at the upper end

Symptoms

  • ESC and ABS warning lamps on
  • Traction and stability assistance switched off

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–600
Time0.5–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

longitudinal accel sensorsensor wiring

Related codes

C0551C0552C0553C0062

References: patents.google.com, patents.google.com, patents.google.com.