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Home >> Chevrolet >> 2017 >> Bolt EV Premier >> Repair and Diagnosis >> Hybrid/Electric Powertrain >> Electric Converters and Controllers >> Hybrid/EV Control System >> Diagnostic Information and Procedures >> DTC P16FF: Engine Controls Ignition Relay Request Signal Message Counter Incorrect >> Circuit/System Description

Circuit/System Description

The Chassis Control Module sends a powertrain relay request to the ECM over serial data. The ECM sets this DTC when it detects a discrepancy in the structure of this message, causing the message integrity to be questioned.