Symptom hub
Transmission Won’t Upshift: Speed Sensor, Ratio, or Limp Mode?
A transmission that will not upshift is often telling you the controller either lost a key speed signal or decided normal shifting is too risky. That makes input-speed, output-speed, and ratio codes far more important than random engine guesses whenever the vehicle is stuck in one gear.
Likely related codes
Start your diagnostic path here
P0700 — Transmission Control System Malfunction P0715 — Input/Turbine Speed Sensor Circuit Malfunction P0717 — Input/Turbine Speed Sensor No Signal P0720 — Output Speed Sensor Circuit Malfunction P0722 — Output Speed Sensor No Signal P0730 — Incorrect Gear Ratio P0731 — Gear 1 Incorrect Ratio P0732 — Gear 2 Incorrect Ratio P0733 — Gear 3 Incorrect Ratio P0734 — Gear 4 Incorrect Ratio P0735 — Gear 5 Incorrect Ratio P0736 — Reverse Incorrect Ratio P0750 — Shift Solenoid A Malfunction P0755 — Shift Solenoid B Malfunction P0760 — Shift Solenoid C Malfunction P0751 — Shift Solenoid A Performance or Stuck Off P0752 — Shift Solenoid A Stuck On P0753 — Shift Solenoid A Electrical P0756 — Shift Solenoid B Performance or Stuck Off P0757 — Shift Solenoid B Stuck On P0758 — Shift Solenoid B Electrical P0761 — Shift Solenoid C Performance or Stuck Off P0762 — Shift Solenoid C Stuck On P0763 — Shift Solenoid C Electrical P0721 — Output Speed Sensor Range/Performance P0723 — Output Speed Sensor Intermittent P0754 — Shift Solenoid A Intermittent P0759 — Shift Solenoid B Intermittent P0764 — Shift Solenoid C Intermittent P0765 — Shift Solenoid D Malfunction P0766 — Shift Solenoid D Performance or Stuck Off P0767 — Shift Solenoid D Stuck On P0768 — Shift Solenoid D Electrical P0770 — Shift Solenoid E Malfunction P0771 — Shift Solenoid E Performance or Stuck Off P0772 — Shift Solenoid E Stuck On P0773 — Shift Solenoid E Electrical P0774 — Shift Solenoid E Intermittent P0718 — Input/Turbine Speed Sensor Circuit Intermittent P0724 — Brake Switch B Circuit High P0725 — Engine Speed Input Circuit Malfunction P0726 — Engine Speed Input Circuit Range/Performance P0727 — Engine Speed Input Circuit No Signal P0728 — Engine Speed Input Circuit Intermittent P0785 — Shift/Timing Solenoid A Malfunction P0786 — Shift/Timing Solenoid A Range/Performance P0787 — Shift/Timing Solenoid A Circuit Low P0788 — Shift/Timing Solenoid A Circuit High P0789 — Shift/Timing Solenoid A Intermittent P2714 — Pressure Control Solenoid D Performance or Stuck Off P2716 — Pressure Control Solenoid D Electrical P2761 — Torque Converter Clutch Pressure Control Solenoid Control Circuit/Open