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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 6T70 - Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P0634: Control Module Overtemperature >> Conditions for Setting the DTC

Conditions for Setting the DTC

Condition 1 

TCM detects an internal temperature condition of 146°C (295°F) or greater for 5s.

Condition 2 

Ignition voltage is 18V or greater and the TCM detects an internal temperature of 50°C (122°F) or greater for 2s.

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