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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 405 (Engine Controls - Self Diagnostics - 6.6L) >> Diagnostic Tests >> DTC P2228: Barometric Pressure Sensor Signal Low - Federal RPO FE9, NG1 >> Test Description

Test Description

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The numbers below refer to the steps in the diagnostic procedure.

  1. 2

    The BARO sensor 5-volt reference circuit is shared with other sensors. If DTC P0651 is set, this indicates that the 5-volt reference circuit is shorted to ground and should be diagnosed first. The short may be on another sensor 5-volt reference circuit.

  2. 4

    If you can duplicate the DTC, the information included in the Freeze Frame/Failure Records data can aid in locating an intermittent condition.

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