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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 P0234: Turbocharger Engine OVERBOOST Condition - CALIFORNIA RPO YF5, Ne1 >> Test Description

Test Description

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 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 procedure.

  1. 5

    This step tests the wastegate actuator diaphragm for a leak.

  2. 6

    This step tests the wastegate actuator, the linkage, and the wastegate for proper operation.

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