OBD-II code · Chassis
C0554 Longitudinal Acceleration Sensor Circuit High
Longitudinal accel sensor signal voltage above expected range. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Is it safe to drive with C0554?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySignal wire shorted to battery
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
Symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–4 h
- Emissions test
- Usually unaffected
- Parts involved
- Longitudinal Accel Sensor, Sensor Wiring
Related codes
- C0551Longitudinal Acceleration Sensor Circuit/Open
- C0552Longitudinal Acceleration Sensor Range/Performance
- C0553Longitudinal Acceleration Sensor Circuit Low
- C0555Lateral Accelerometer Voltage Out of Range
- C0556Brake Booster Pressure Sensor Performance
- C0557Left Rear Wheel Speed Sensor A Incorrect Component Installed
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.