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Home >> GMC >> 1997 >> Forward Control 4.3 W, L35, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Controls - Tests W/Codes - 6.5L Diesel (P Series)) >> Diagnostic Trouble Codes >> DTC P0251 - Injection Pump Cam System >> Diagnostic Aids

Diagnostic Aids

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Fast idle and poor performance will exist when PCM is in back-up fuel. If DTC P0370 is also set, possible problem exists with signal circuit. If vehicle runs out of fuel, DTCs P0251 and P0370 will set.