General circuit fault of a sixth transmission pressure sensor or switch, labelled F. No manufacturer documents this code publicly, and no gearbox with a switch F was found. GM's six-speeds stop at TFP switch 5 (letter E, P0989/P0990), and Mitsubishi's 2019 six-speed monitors its 2-6 brake, high clutch and low-reverse brake switches under P0846, P0876 and P0988, which are letters B, D and E. Pressure switches like these sit in the valve body module and tell the module which clutch is applied; Sonnax describes them as normally closed film-and-piston switches. P0992 would be the code for an open or implausible circuit without a low/high split, as CARB requires circuit checks on transmission inputs. Range/performance, low, high and intermittent are P0993 to P0996.
Medium severity. Can I keep driving?Drive gently to a repair shop. If it slips, you hear clunks, or it loses its gears, do not keep driving.
Symptoms
- Warning light depending on manufacturer calibration
- Harsh or delayed shifts
- Possible limp mode with a fixed gear
Most likely causes
- Open or damaged signal wire or connector to the switch
- Pressure switch or sensor failed inside the valve body module
- Transmission control module input fault
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: hard
- It can trigger limp mode.
- It affects emissions.
What each character of P0992 means
- P: Powertrain: engine and transmission
- 0: Generic code: same on every make
- 9: Transmission
- 92: Specific fault in that system
Frequently asked questions
Can I keep driving with code P0992?
Drive gently to a repair shop. If it slips, you hear clunks, or it loses its gears, do not keep driving.
What causes code P0992?
The most common causes are: open or damaged signal wire or connector to the switch; pressure switch or sensor failed inside the valve body module; transmission control module input fault.
Related codes
- P0993Transmission Fluid Pressure Sensor/Switch F Circuit Range/Performance
- P0994Transmission Fluid Pressure Sensor/Switch F Circuit Low
- P0995Transmission Fluid Pressure Sensor/Switch F Circuit High
- P0996Transmission Fluid Pressure Sensor/Switch F Circuit Intermittent
- P0987Transmission Fluid Pressure Sensor/Switch E Circuit
Sources
- law.cornell.edu: 13 CCR 1968.2
- sonnax.com: 215 under pressure shift quality pressure switches
- mitsubishitechinfo.com: M123103140009500USA
- saabwisonline.com: dtc p0989 or p0990
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.