GM Service Manual Online
For 1990-2009 cars only

Conditions for Setting the DTC

This code sets when the vehicle's battery voltage is continuously above 16.5 V or below 9.0 V.

Action Taken When the DTC Sets

During this period of voltage out-of-range, the detection of leveling output and position out-of-range malfunction, the air replacement cycle (ARC), intake and exhaust activities are disabled. This is necessary to prevent erroneous detection of malfunction conditions due to engine crank or unusual system voltage conditions.

Conditions for Clearing the DTC

    • The DTC will clear when the battery voltage returns to its nominal range.
    • Using a scan tool.

Diagnostic Aids

    • The battery system should be checked for proper functionality.
    • This code does not require the replacing of the automatic level control sensor.
    • This code will not cause the LEVELING indicator lamp to flash.
    • Make sure that the automatic leveling control sensor is receiving the correct voltage.
    • Make sure that the automatic leveling control sensor has a good ground.