P0880TCM Power Input Signal
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- The TCM power input codes watch the supply voltage of the gearbox module or of its solenoid supply. Without a proper supply all solenoids go dead and the gearbox falls back to its hydraulic emergency gear with maximum line pressure: a fixed gear, harsh engagement, no shifting. Ford's external gearbox modules check a window of 9 to 16 V; GM reports the same under P0562/P0563. P0880 is the general fault. Hyundai's 2017–19 six-speed automatics set it when the solenoid supply drops below 7 V or rises above 22 V: MIL on, limp mode in 4th gear. Hyundai's bulletin points to the valve body harness and the TCU fuses and expressly not to the gearbox.
- What you may notice
- MIL on
- Limp mode in a fixed gear, no shifting
- Harsh engagement into D or R
- Likely causes
- LikelyHarness or connector between module and valve body damaged or corroded
- PossibleTCU fuse or transmission relay faulty
- PossibleWeak battery, charging fault, poor ground
- RareGearbox module faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.