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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 P0815, P0816, or P0826: Up and Down Shift Switches >> Conditions for Setting the DTC

Conditions for Setting the DTC

P0815 - Condition 1 

TCM detects an upshift request for 1 second in Park or Neutral.

P0815 - Condition 2 

TCM detects an upshift request for 10 minutes in any forward range.

P0816 - Condition 1 

TCM detects a downshift request for 1 second in Park or Neutral.

P0816 - Condition 2 

TCM detects a downshift request for 10 minutes in any forward range.

P0826 

TCM detects an invalid voltage on the Tap up/Tap down signal circuit for 1 minute.

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