What it means
Pressure control solenoid G stays in the activated state when commanded off. Affected hydraulic circuit stays pressurised.
At a glance
- Usually lights the check-engine light
- The engine or gearbox may go into limp mode
How it works
Pressure control solenoid G controls pressure in a transmission hydraulic circuit, switching according to commands from the transmission control module. This code sets when the module commands solenoid G off but the circuit remains activated and pressurised, which can result from a stuck-open spool or an output driver that remains on.
Common causes
Most likely first.
- Solenoid spool stuck in open position
- TCM output driver stuck on
- Carbon or debris buildup preventing free movement
Symptoms
- Check-engine or transmission warning light
- Harsh or delayed shifts
- Transmission may slip or hesitate
- Transmission may enter limp mode
How to diagnose it
- Check freeze-frame data for the gear, temperature, and solenoid G command when the fault occurred.
- Use live data to see whether the module commands solenoid G off while pressure or shift behavior indicates that its circuit remains active.
- Inspect solenoid G’s connector and harness for shorts, damaged insulation, or corrosion that might keep the circuit energized.
- With the manufacturer's diagnostic procedure, check whether the control module output to solenoid G switches off as commanded.
- If the electrical output behaves correctly, inspect solenoid G and its valve-body passage for a spool held open by wear or debris.
Common fixes
- Repair wiring shorts or poor connections that keep solenoid G energized.
- Clean or replace solenoid G if its spool sticks in the open position.
- Remove debris from the affected hydraulic passage and repair valve-body damage.
- Repair the transmission control module output driver if testing confirms that it stays on when commanded off.
Can I keep driving?
Avoid driving farther than needed to reach a safe place if shifts are harsh or the transmission slips; an affected circuit that stays pressurised can cause unpredictable shifting and further damage. Arrange diagnosis promptly, especially if limp mode occurs.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.