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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1047 (Engine Controls Diagnosis - 6.6L (LLY) (DTC P0238 To DTC P0652)) >> Diagnosis >> DTC P0300 (Federal Emissions) >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

A misfire with no other DTCs will be caused by an engine mechanical or fuel injector problem.

DTC P0300 (Federal Emissions)

Step Action Yes No
1 Did you perform the Diagnostic System Check - Engine Controls? Go to Step 2  Go to Diagnostic System Check - Engine Controls
2 Are any other DTCs set? Go to Diagnostic Trouble Code (DTC) List Go to Fuel Injector Balance Test with Tech 2 (with Automatic Transmission)Fuel Injector Balance Test with Tech 2 (with Manual Transmission)
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