Automatic Level Control

DTC C0550

Diagnostic Instructions

- Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
- Review Strategy Based Diagnosis for an overview of the diagnostic approach.
- Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C0550: Electronic Control Unit (ECU) Performance.

Circuit/System Description

The automatic level control (ALC) sensor detects an internal malfunction.

Conditions for Running the DTC

The ignition switch is in the ON position.

Conditions for Setting the DTC

An internal ALC sensor malfunction exists.

Action Taken When the DTC Sets

One or more of the following actions may occur:
- The ALC system is disabled.
- The SERVICE SUSPENSION SYS message is displayed.

Conditions for Clearing the MIL/DTC

- The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
- The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Circuit/System Verification

DTC C0550 will set as result of internal ALC sensor circuit failure.
-> Replace the ALC sensor.