P0887TCM Power Relay Control Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Some gearboxes draw their power through a relay, such as the transmission control relay in Chrysler's fuse box that feeds the solenoids. P0885 to P0887 cover the coil control of that relay, P0888 to P0892 its sense line, which reads back the switched output and compares it with the command. A dead relay leaves all solenoids without power, so the gearbox drops into its hydraulic emergency gear. P0887 means the coil control line sits high: a short to voltage or voltage present despite the command. FCA's 948TE nine-speed in the 2014–15 Cherokee, Chrysler 200 and Ram ProMaster City stored it with MIL, and three bulletins cured it with a gearbox module reflash, so an over-sensitive detection can cause it too.
- What you may notice
- MIL on
- Shift problems or limp mode
- Likely causes
- LikelyGearbox module software (FCA 948TE)
- PossibleControl wire shorted to voltage
- PossibleRelay faulty
- 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: €80 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.