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Home >> Chevrolet >> 2021 >> Blazer RS, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 11 (Engine Controls And Fuel - 2.5L (LCV) - Diagnostic Information And Procedures (2 Of 2)) >> Diagnostic Information and Procedures >> DTC P163A >> Circuit/System Description

Circuit/System Description

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These DTCs apply to microprocessor integrity conditions within the engine control module. This diagnostic also checks if the ECM is programmed.

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