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Home >> Chevrolet >> 2006 >> Chevy Express G2500, Van Cargo Extended, 6.6 2 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 6.6L (LLY) - DTC P0401 To DTC P268A >> DTC P0671-P0678 >> Circuit/System Verification

Circuit/System Verification

Refer to Testing for Intermittent Conditions and Poor Connections if you cannot duplicate the conditions.

If DTC P064C is also set, diagnose DTC P064C first.

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