P099C

Shift Solenoid G Control Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–67 (est.)

Symptoms

Incorrect gear shifting
The gearbox goes into emergency mode
Check Engine light comes on
Loss of power or jerking when shifting
Increased speed in neutral

Causes

Open or short circuit in solenoid circuit
Solenoid G fault
Transmission wiring harness problems
Transmission control module (TCM) malfunction
Corroded contacts or poor connection

How to Fix

Check the integrity of the solenoid control circuit
Measure the resistance of solenoid G
Inspect the wiring harness and connectors for damage.
Check the functionality of the transmission control unit
If necessary, replace solenoid G

Related codes

P099A P099B P099D