Diagnostic Trouble Code (DTC) Information TCM-P082601

Condition 

The circuit board of the gear selector module (GSM) houses three Hall sensors. A permanent magnet on the gear selector lever influences the output signals from the sensors to the gear selector module (GSM). The automatic transmission remains in position D hydraulically when the gear selector is moved to the manual shifting position (+/-). When the gear selector is moved up (+), the gear selector module (GSM) sends a signal to the transmission control module (TCM) to upshift. If the manual selector lever is moved down (-), the gear selector module (GSM) sends a signal to the transmission control module (TCM) to downshift.

The diagnostic trouble code (DTC) is stored if the control module detects that:

• The signals from the gear selector are not accurate for manual mode (+/-).

The control module's test for the diagnostic trouble code (DTC) starts in the event of:

• Ignition on.

Substitute Value 

• No manual gear shift

Possible Source 

• Gear selector module (GSM) not working.

Fault symptom[s] 

• Changes gear as in position D in position MAN
• No gear shift