Action Taken When the DTC Sets

P0776

• DTC P0776 is a Type A DTC.
• The TCM commands maximum line pressure.
• The TCM inhibits Tow/Haul mode.
• The TCM freezes transmission adaptive functions.
• The TCM inhibits TAP Up/Down function.
• The TCM inhibits Manual Up/Down Shift with the shift selector.
• The TCM inhibits auto grade braking.
• The TCM limits the transmission to 2nd gear if the output speed sensor signal is less than 1,400 RPM. No upshift will occur.
• The TCM limits the transmission to 4th gear if the output speed sensor signal is 1,400 RPM or greater.

P0777

• DTC P0777 is a Type A DTC.
• The TCM commands maximum line pressure.
• The TCM inhibits Tow/Haul mode.
• The TCM freezes transmission adaptive functions.
• The TCM inhibits TAP Up/Down function.
• The TCM inhibits Manual Up/Down Shift with the shift selector.
• The TCM limits the transmission to Reverse gear and 3rd gear operation.
• The TCM inhibits auto grade braking.