P0993Transmission Fluid Pressure Sensor/Switch F Circuit Range/Performance
- 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
- Pressure sensor or switch F is electrically intact, but its reading does not match what the module expects from the commanded clutch state. No manufacturer documents this code publicly. The closest documented logic is GM's for switch E (TFP switch 5, 6T70/6T75): the module checks after each clutch release whether the switch returns to its exhausted state and counts failures, at 50 kPa or less commanded pressure for the low case. A sixth switch would be checked the same way, plausibility against commanded pressure and gear, which CARB requires for transmission inputs. Typical causes are sticking regulator valves, debris and worn switch films rather than wiring. P0992 is the plain circuit fault, P0994/P0995 are low and high.
- What you may notice
- Harsh or flared shifts
- Shift adaptation frozen
- Warning light depending on calibration
- Likely causes
- LikelySticking clutch regulator valve feeding the switch
- PossibleWorn or delaminated switch film, debris in the switch
- PossibleLow or contaminated transmission fluid
- 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 – €1,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.