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Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 66 (HVAC System - Automatic) >> Diagnostic Information and Procedures >> DTC P0645, P0646 or P0647: Air Conditioning (A/C) Compressor Clutch Relay Control Circuit >> Conditions for Setting the DTC

Conditions for Setting the DTC

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.

P0645 or P0646 

The ECM detects a short to ground or an open at the A/C compressor clutch relay control circuit.

P0647 

The ECM detects a short to voltage at the A/C compressor clutch relay control circuit.

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