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Conditions for Setting the DTC

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.

B3938 01 

Control module K9 detects:Control - Relay Coil = Short to Voltage

B3938 02 

Control module K9 detects:Control - Relay Coil = Short to Ground

B3938 04 

Control module K9 detects:Control - Relay Coil = Open/High Resistance

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