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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 92 (Engine Controls - Self-Diagnostics - 6.6L Diesel) >> Diagnostic Tests >> DTC P0090: Fuel Rail Pressure Sensor Current Out Of Range >> Test Description

Test Description

WARNING: This page is about a different car, the 2002 GMC Sierra, 2002 GMC Cab & Chassis Sierra, 2002 Chevrolet Silverado, and 2002 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers in the diagnostic procedures.

  1. 6

    This step tests for battery voltage through the ECM to the FRP regulator.

  2. 7

    This step tests for an open control circuit between the ECM and the FRP regulator.

  3. 8

    This excessive current code can be set by voltage being applied between the ECM and the FRP regulator on the FRP control circuit.
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