P099A

Shift Solenoid G Control Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$28–89 (est.)

Symptoms

Erratic gear shifting
Hard or abrupt shifts
Switching to emergency mode of the gearbox
The Check Engine light comes on
Reduced vehicle dynamics

Causes

Open or short circuit in solenoid G circuit
Shift Solenoid G Malfunction
Poor contact in circuit connectors
Low or contaminated transmission fluid
Transmission control module (TCM) problems

How to Fix

Check the level and condition of the transmission fluid
Diagnose the solenoid G control circuit for opens and shorts
Check the resistance and performance of solenoid G
Inspect connectors and wiring for corrosion or damage.
Replace shift solenoid G if necessary

Related codes

P099B P0997 P0998