P0753Shift solenoid A (UD brake) fault

• Hyundai/Kia code · Engine
• Turns on the check-engine light

How the car detects it

On Hyundai/Kia 6-speed automatics, solenoid A controls the underdrive (UD) brake. The transmission may go into a fail-safe gear. Check the wiring between computer and transmission before the solenoid or valve body.

What you may notice

• Check-engine light
• Harsh shifts or stuck in one gear

Likely causes

• PossibleThe solenoid
• PossibleValve-body internal harness or the external transmission harness
• RareEngine/transmission computer

Sources

• static.nhtsa.gov › SB-10059670-2273.pdf · official document
• static.nhtsa.gov › SB-10059669-2273.pdf · official document

Backed by an official manufacturer document.

From Obdaryn's Hyundai/Kia pack, exactly as the app shows it, with the public sources above. Guidance only; confirm with a workshop.