P0884TCM Power Input Signal Intermittent
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- 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. P0884 reports a brief loss of supply. Chrysler calls it 'power up at speed': the module notices on start-up that the vehicle is already moving, so it must have rebooted while driving. In field reports from NHTSA investigation PE07-027 on 2007 Jeeps it was stored after engine stalls, among others from an unlatched fuse box connector.
- What you may notice
- Gearbox jerks or briefly enters limp mode while driving
- Engine may stall with a combined powertrain module
- Warning lamps flicker
- Likely causes
- LikelyLoose or unlatched connector at fuse box or module
- PossibleIgnition switch or relay with contact dropouts
- PossibleBattery terminal or ground loose
- RareInternal module reset
- 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: €0 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.