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Home >> Buick >> 2015 >> Verano Premium, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Controls And Fuel - 2.4L (Lea) - DTC P0335 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0641, P0651, P0697, or P06A3 (ECM): 5V Reference Circuit >> Circuit/System Description

Circuit/System Description

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The engine control module (ECM) has 4 internal 5V reference circuits. Each internal reference circuit provides a 5V reference for more than one sensor. A short to ground or short to voltage on one external 5V reference circuit will affect the other components connected to the same internal reference circuit.

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