P285AClutch B Pressure Disengagement Performance/Too 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
- With P285A the module reports a release-side pressure fault involving clutch B. Mitsubishi's Mirage CVT evaluates it while the auxiliary gearbox is commanded into its second stage: a ratio that remains within 10 % of the first stage (1.639–2.003) for 0.5 s, or that drops to 0.500 or below or climbs to 1.500 or above for 0.2 s, sets the code. On the Nissan Kicks and Versa the number carries extra weight: if it appears together with P0875, the fluid pressure switch D code, Nissan has the control valve replaced straight away without the belt inspection required for the other codes. In daily driving the car may refuse the upper stage, flare between shifts or drop into a limp program, while the lower stage often stays usable.
- What you may notice
- Upper stage or even gears not available
- Flare between shifts, then a hard engagement
- Limp mode with warning lamp
- Likely causes
- LikelyDefective control valve, especially when P0875 is stored at the same time
- PossibleLeak in the clutch B circuit preventing a clean handover
- RareFaulty clutch pressure switch or its wiring
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €150 – €4,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.