P083D

What it means

P083D is the generic code for a high input fault in the Transmission Fluid Pressure Sensor/Switch 'G' circuit. The transmission control unit saw a voltage or signal from this sensor or switch above the expected range, which suggests a short to voltage, an open circuit on the signal or ground side, or a faulty sensor. Which hydraulic circuit 'G' refers to depends on the manufacturer and the transmission, so the service information for the vehicle is needed to identify it.

Symptoms

• Gearbox warning light or malfunction indicator lamp on
• Harsh, delayed or flared gear changes
• Transmission stuck in a single gear (limp mode)
• Slipping or loss of drive in certain gears
• Reduced performance or poor economy
• Gearbox failing to shift out of a gear or into a particular range

Possible causes

• Faulty transmission fluid pressure sensor or switch 'G' reading high or out of rangelikely
• Damaged, chafed or corroded wiring to the sensor, including a short to voltage or an open circuit on the signal or ground wirelikely
• Poor connection at the sensor, valve body or transmission connector (water ingress, bent or loose pins)likely
• Transmission fluid that is contaminated, degraded or at the wrong level, upsetting pressure readingspossible
• Hydraulic or valve body fault causing a genuine pressure reading outside the expected rangepossible
• Faulty transmission control unit or its sensor supply or groundrare

How to diagnose

1. Read all stored and pending codes and the freeze frame data, noting gear, fluid temperature and speed when the fault set, and check for related pressure or solenoid codes
2. Check the transmission fluid level and condition, following the manufacturer's procedure, as many units are sealed and need a specific temperature
3. Inspect the wiring and connectors between the sensor and the control unit for chafing, heat damage, corrosion, water and pin tension
4. Identify which circuit 'G' is on this transmission from the service information, and find the sensor location and wiring diagram
5. Using live data, compare the pressure sensor reading with the specified value with the ignition on and the engine running, and watch for a fixed high value
6. Check the sensor supply voltage, signal and ground at the connector against the wiring diagram, and test the wiring for a short to voltage or an open circuit
7. Check the sensor itself against the specified resistance or output, and inspect the valve body for faults if the electrical checks are good
8. Clear the codes and road test to confirm the fault does not return

How to fix

• Replace the faulty fluid pressure sensor or switch and clear the code, using the correct fluid and procedure for the transmission
• Repair or replace damaged wiring, and clean or replace corroded or damaged connectors
• Correct the fluid level or replace degraded fluid and filter if the manufacturer's procedure allows
• Repair or replace the valve body or hydraulic components if a genuine pressure fault is confirmed
• Repair or replace the transmission control unit only after the sensor, wiring and supply have been proven good, and carry out any required adaptation or programming

Can I keep driving?

Nearby codes

• P083CGenericTransmission Fluid Pressure Sensor/Switch G Circuit Low
• P083EGenericTransmission Fluid Pressure Sensor/Switch G Circuit Intermittent