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Home >> Chevrolet >> 2018 >> Volt Premier >> Repair and Diagnosis >> Body & Frame >> Ignition Switch/Steering Lock >> Immobilizer System >> Diagnostic Information and Procedures >> DTC P1631 >> Conditions for Setting the DTC

Conditions for Setting the DTC

Hybrid/EV Powertrain Control Module 1 

The hybrid/EV powertrain control module 1 receives incorrect immobilizer data from the BCM.

Engine Control Module 

The ECM receives incorrect immobilizer data from the BCM.