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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 16 (Automatic Transmission - 6T40 - DTC P0601 To DTC P0971) >> Diagnostic Information and Procedures >> DTC P0634: Control Module Overtemperature >> Conditions for Setting the DTC

Conditions for Setting the DTC

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Condition 1 

TCM has detected an internal temperature condition of 144°C (291°F) or greater for 5s.

Condition 2 

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

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