P0987Transmission Fluid Pressure Sensor/Switch E 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
- General circuit fault of transmission fluid pressure sensor or switch E. No manufacturer documents this code publicly. The only public user of switch E found, GM's 6T70/6T75 family (Saab 9-4X: switch 5 on the low/reverse and 4-5-6 clutch regulator valve), reports only P0989 and P0990 for it, both as plausibility counts. P0987 is the slot for a module that sees a generic circuit fault on a fifth pressure sensor or switch, for example an open or out-of-range signal, without separating low from high. CARB requires circuit checks on transmission inputs. Range/performance is P0988, low and high are P0989/P0990; switches A to D use P0840 to P0878. Typical effects are frozen shift adaptations and harsher shifts.
- What you may notice
- Warning light depending on manufacturer
- Harsher or less consistent shifts
- Possible limp mode
- Likely causes
- LikelyFailed pressure sensor or switch E
- PossibleOpen or shorted signal wire or poor connector contact
- RareFaulty input stage in the transmission control 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: €150 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.