Powertrain, generic · Transmission

P0780 Shift Error

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Shift codes are a functional check of the gear change itself: the module compares the commanded shift with the speed trace and flags a shift that takes too long, is too short or abrupt, does not happen, flares or ties up. Ford does not use P0780–P0784 (its shift completion check feeds the solenoid codes), nor do GM's 2018–2025 tables. P0780 is the collective code when the faulty shift is not assigned to a gear. GM's 2006 Aisin-type five-speed counts five shifts that are too long, too short or tied up with fluid above 60 °C and lights the MIL at once; GM's Honda-built unit flags a 3–4 shift that stays in the lower ratio after two trips; Saab's 2010 Aisin six-speed counts ten faulty shifts without MIL, limits torque and keeps second and reverse. Nissan fixed P0780 on the 2021 Rogue CVT with new software.

Likely causes

Fluid level wrong, fluid worn or contaminated
Valve body, shift or pressure valve sticking
Worn clutches or bands (mechanical damage)
Module software or shift adaption
Faulty speed sensor signal

Symptoms

  • Harsh, delayed or missing shifts
  • Engine flare during shifts
  • Warning lamp
  • Limp mode with fixed gear, reduced power

Repair estimate

DifficultyHardWorkshop job
Parts and labour€150–3,500
Time1–12 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

transmission valve bodyshift solenoidtransmission clutchestransmission control module

Related codes

P0781P0782P0783P0784P0730P0894

References: gsi.ext.gm.com, gsi.ext.gm.com, saabwisonline.com, saabwisonline.com.