P0892TCM Power Relay Sense Circuit 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
- 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. P0892 reports a sense signal that drops out now and then, from a loose contact in relay, socket or wiring. Brief supply interruptions can reboot the module (compare P0884) and cause shift shocks. No maker publishes a strategy.
- What you may notice
- Sporadic gearbox warning
- Brief limp mode or shift shock
- Likely causes
- LikelyLoose contact in relay socket or connector
- PossibleRelay with worn contacts
- PossibleWire broken by vibration
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.