Chassis, generic

C0553 Longitudinal Acceleration Sensor Circuit Low

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Signal wire chafed through and shorted to ground
Sensor reference supply missing or collapsed
Sensor output stage failed at the lower end

Symptoms

  • ESC and ABS warning lamps on from start-up
  • Stability control and hill-hold unavailable

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

C0551C0552C0554C0062

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