Transmission fluid pressure sensor/switch G is one of up to eight pressure inputs (A to H) that SAE J2012 provides for automatic gearboxes. No maker could be found that uses the letter G: GM's tables up to 2025, Ford's summaries and Allison stop at A to E. The description therefore follows the general rule for gearbox inputs in California's OBD regulation, which demands circuit and plausibility checks, and the logic of the A and B codes. P083A is the general circuit fault, set when the module sees a fault on this input without telling low, high or plausibility apart.
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
- Check engine or transmission warning lamp on
- Limp mode with substitute gear or limited ratio
- Harsh or delayed shifts
Most likely causes
- Pressure switch or sensor in the valve body faulty or stuck
- Harness or connector at the gearbox: fluid wicking, corrosion
- Sticking valve in the valve body
- Fluid level or condition
- Transmission control module
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 P083A means
- P: Powertrain: engine and transmission
- 0: Generic code: same on every make
- 8: Transmission
- 3A: Specific fault in that system
Frequently asked questions
Can I keep driving with code P083A?
Drive gently to a repair shop. If it slips, you hear clunks, or it loses its gears, do not keep driving.
What causes code P083A?
The most common causes are: pressure switch or sensor in the valve body faulty or stuck; harness or connector at the gearbox: fluid wicking, corrosion; sticking valve in the valve body.
Related codes
- P083BTransmission Fluid Pressure Sensor/Switch G Circuit Range/Performance
- P083CTransmission Fluid Pressure Sensor/Switch G Circuit Low
- P083DTransmission Fluid Pressure Sensor/Switch G Circuit High
- P0840Transmission Fluid Pressure Sensor/Switch A Circuit
- P084ATransmission Fluid Pressure Sensor/Switch H Circuit
Sources
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.