P0868Transmission Fluid Pressure Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0867 to P0869 cover the system or line pressure of the gearbox as a whole: a pressure sensor measures it and the control module compares it with the pressure it commands. Faults of the sensor circuit itself have their own codes (Chrysler 68RFE P0932 ff), the single switches A to H have theirs (P0840 ff). Thresholds are not published; the codes are documented in bulletins for the Ram 68RFE and for the Tremec dual clutch of Corvette C8 and Maserati MC20. P0868 means the measured pressure stays below target. Chrysler calls it 'Line Pressure Low' on the 68RFE and fixed some cases with a software update; on 2024 Ram trucks it came with P0841 from a failed rear thrust washer. On the Corvette a sticking pressure valve is typical. The module then commands maximum pressure.
- What you may notice
- Transmission warning lamp or MIL on
- Slipping, delayed engagement
- Limp mode
- Overheating under load
- Likely causes
- LikelyFluid level low, leak or clogged filter
- LikelyPressure control valve or solenoid sticking from dirt
- PossibleInternal leakage or mechanical damage: thrust washer, seal rings, pump
- RareSoftware calibration of the target pressure
- RareLine pressure sensor reading low
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €5,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.