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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 104 (Engine Controls Self-Diagnostics - 6.5L) >> Diagnostic Tests >> DTC P0263, P0266, P0269, P0272, P0275, P0278, P0281 & P0284: Cylinder Balance System >> Diagnostic Aids

Diagnostic Aids

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The injector balance test on the scan tool should be used to confirm fault cylinder problems. The scan tool will cutout the specific cylinder requested. If a cylinder balance fault has been detected and the engine has been running for a long time, the PCM may try to increase or decrease fuel in the other cylinders in order to compensate for a rough idle. This can cause multiple cylinder balance DTCs to set. Malfunctioning nozzles are the most likely cause of cylinder balance DTCs.

If multiple cylinder balance DTCs are set and no problem is found, check for:

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