What it means
A fault has been detected in shift solenoid G operation or its circuit. 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 directs hydraulic pressure within the transmission. The control module monitors its operation and circuit, and this code means a fault has been detected but does not specify whether the cause is electrical, mechanical, or hydraulic.
Common causes
Most likely first.
- Shift solenoid G fault
- Open or short in solenoid wiring
- Poor connector contact or corrosion
- Valve body fault affecting solenoid operation
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 transmission codes, then review live data for solenoid G commands and the shifts affected.
- Check transmission fluid condition and level using the manufacturer's procedure, since fluid problems can affect valve operation.
- Inspect solenoid G's connector and wiring for corrosion, loose contacts, fluid intrusion, or damage.
- Use a scan tool's supported active test to command solenoid G and compare the response with the manufacturer's expected operation.
- If the circuit responds correctly but shifting remains abnormal, inspect solenoid G and the valve body for sticking or wear.
Common fixes
- Correct the transmission fluid level or service contaminated fluid according to the manufacturer's guidance.
- Clean and secure solenoid G's connector or repair damaged wiring.
- Replace shift solenoid G if testing confirms it has failed.
- Clean or repair a sticking valve body passage.
- Replace worn valve body components if inspection confirms leakage or sticking.
Can I keep driving?
Avoid towing, hard acceleration, and long trips if shifts are harsh, delayed, slipping, or unpredictable. Stop driving if the transmission loses drive or slips severely, since continued operation can worsen 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.