What it means
The longitudinal acceleration sensor signal is below the expected range. This can affect stability-control functions that use the sensor.
At a glance
- Usually lights the ABS or stability-control warning light
- The engine or gearbox may go into limp mode
How it works
The longitudinal acceleration sensor reports vehicle acceleration to the stability-control module. C0553 sets when the sensor signal is below the expected range, which can point to a sensor fault, a wiring or contact problem, or a supply or ground issue.
Common causes
Most likely first.
- Faulty longitudinal acceleration sensor
- Damaged wiring or poor connector contact
- Sensor supply or ground fault
Symptoms
- Stability-control warning light
- Stability control or traction control may be limited
How to diagnose it
- Record freeze-frame data and inspect live longitudinal acceleration data to confirm the signal is low and note when the fault occurs.
- Inspect the sensor connector and harness for corrosion, loose terminals, chafing, or damage that could pull the signal low.
- Check the sensor's power supply and ground connections using the vehicle wiring diagram.
- Test the signal circuit for shorts to ground and poor terminal contact, then compare supply, ground, and signal with the manufacturer's specification.
- If the circuit and supplies pass, test the longitudinal acceleration sensor and check for vehicle-specific calibration requirements.
Common fixes
- Repair a damaged wire or poor connector contact in the longitudinal acceleration sensor circuit.
- Clean or replace corroded terminals and restore a secure connector fit.
- Repair a sensor supply or ground fault.
- Replace the longitudinal acceleration sensor if its output remains low with a sound circuit and correct supply.
Can I keep driving?
Stability or traction control may be limited, so drive gently and avoid slippery roads or sudden manoeuvres. If the vehicle enters a reduced-function mode or handling changes, stop safely and arrange assistance.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.