P0780

DTC P0780: Problem in Shift Control System
2005 Model

NOTE: Record all freeze data and review General Troubleshooting Information before you troubleshoot.

1. Check whether the HDS indicates another code.
Does the HDS indicate another code?
YES- Do the DTC Troubleshooting for the indicated code(s). Recheck for DTC P0780 after troubleshooting.
NO- Go to step 2.
2. Measure the stall speed rpm in the D position.
Is the stall speed over 3,500 rpm?
YES- Replace the transmission.
NO- If the stall speed is below 2,000 rpm, replace the lower valve body assembly. If the stall speed is 2,000 - 3,500 rpm, go to step 3.
3. Drive the vehicle at 37 mph (60 km/h) constantly for several minutes, and check the engine speed with respect to vehicle speed.
Is the engine speed within specification?
YES- Replace the lower valve body assembly.
NO- Replace the transmission.