P084ATransmission Fluid Pressure Sensor/Switch H Circuit
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- Transmission fluid pressure sensor/switch H is the last of up to eight pressure inputs (A to H) in SAE J2012; the letter is the maker's choice. Documented uses are rare: Mitsubishi sets P084A on its Jatco CVT8 (F1CJC/W1CJC) and Ford P084B on the 2020–23 Explorer 3.3 full hybrid. Mitsubishi uses P084A as a function check of the primary pulley pressure sensor: the module compares primary with secondary pressure and sets the code after 5 s outside the map at a steady ratio of 0.5 to 1.0. Electrical faults of both sensors come first as P0842/P0843/P0847/P0848; belt slip and wear debris in the fluid often follow, cured with a valve body or belt and pulley set.
- What you may notice
- Warning lamp on
- Judder or slipping when pulling away
- CVT limp mode with limited ratio
- Likely causes
- LikelyValve body with faulty primary or secondary pressure sensor
- LikelyCVT belt or pulleys damaged, slip and debris in the fluid
- PossibleHarness or connector
- RareControl module software or module
- 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: €800 – €5,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.