What it means
Shift solenoid G appears stuck on. The code does not identify the cause or which gears the solenoid controls.
At a glance
- Usually lights the check-engine light
How it works
Shift solenoid G is an electrically controlled valve that routes hydraulic pressure inside the transmission. This code sets when the control module detects that solenoid G appears to remain on, but it does not specify the gears it controls or whether debris, the solenoid, or the valve body is responsible.
Common causes
Most likely first.
- Solenoid stuck open by debris
- Stuck valve spool in the valve body
- Carbon or debris buildup preventing free movement
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
How to diagnose it
- Record freeze-frame data and review live data for the commanded state of solenoid G and the shift conditions when the fault appears.
- Check transmission fluid condition and level using the manufacturer's procedure, since debris can prevent solenoid G from moving freely.
- Inspect the solenoid G connector and harness for damage, contamination, or poor contact that could affect its command.
- Use a scan tool's supported active test to command solenoid G and compare the transmission response with the manufacturer's expected operation.
- If the electrical command is correct but solenoid G remains on, inspect the solenoid and valve body spool for debris or sticking.
Common fixes
- Correct the fluid level and service contaminated fluid as directed by the manufacturer.
- Clean or secure solenoid G's connector and repair damaged wiring.
- Clean or replace a solenoid G that is sticking from debris.
- Clean or repair a stuck valve body spool.
- Replace worn valve body parts if inspection confirms they prevent free movement.
Can I keep driving?
Avoid towing, hard acceleration, and long trips if shifts are harsh, delayed, or slipping. Stop if the transmission loses drive or slips severely, because continued driving can worsen internal damage.
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.