What are the common causes of C0551?

An open circuit in the longitudinal acceleration sensor wiring. A failed longitudinal acceleration sensor. A loose or corroded sensor connector. A broken wire in the sensor harness. A fault in the module reading the sensor.

Inspect the sensor connector and wiring. Test the sensor circuit for an open. Check the sensor output on a scan tool. Replace the sensor or repair the harness. Clear the code and retest.

C0551

Longitudinal Acceleration Sensor Circuit/Open

System: Chassis control (C code)
Lamp: Chassis Warning Light
Category: Chassis

What it means

C0551 means Longitudinal Acceleration Sensor Circuit/Open.

Where it lives

For C0551, the circuit described runs through the sensor. The description of C0551 reports the sensor as open.

Check these first

An open circuit in the longitudinal acceleration sensor wiring
A failed longitudinal acceleration sensor
A loose or corroded sensor connector
A broken wire in the sensor harness
A fault in the module reading the sensor

What to do next

Inspect the sensor connector and wiring
Test the sensor circuit for an open
Check the sensor output on a scan tool
Replace the sensor or repair the harness
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.