P0750 on Kia: How to Diagnose & Fix
Shift Solenoid A Malfunction
1 Kia model · 1 documented issue · 1 critical
P0750 on Kia by model: symptoms, diagnosis and fix
K5 models equipped with the 8-speed conventional automatic transmission (paired with the 2.5T Turbo engine in higher trims) have generated complaints of harsh, jerky upshifts—particularly the 1-2 and 2-3 shifts—and in some cases the transmission entering limp mode (restricted to lower gears) after a fault is detected. This is distinct from the DCT shudder issue and specifically affects the hydraulic 8AT unit. TSBs from Kia/Hyundai on the shared 8AT platform have addressed TCU software logic for shift pressure and torque converter clutch engagement.
Common Symptoms
- Hard or jerky upshift felt between 1st-2nd or 2nd-3rd gears
- Transmission warning light or check engine light illumination
- Vehicle entering limp mode with limited gear availability
- Delayed or hunting gear changes during light throttle driving
- Transmission slipping sensation before engaging next gear
How to Fix
Kia dealers perform TCU reprogramming via KDS (Kia Diagnostic System) using updated calibration files per TSB TR-004 and related bulletins. In cases of internal valve body damage from repeated harsh shifts, valve body replacement or full transmission replacement may be required. TCU software update is typically covered under powertrain warranty. Valve body replacement parts range from $600–$1,200 plus labor.
P0750 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0750 mean on a Kia?
P0750 stands for "Shift Solenoid A Malfunction." This code indicates the transmission control system detected a malfunction in shift solenoid 'A', one of the electrically operated valves that direct hydraulic fluid to engage gears. The computer commands these solenoids to control upshifts and downshifts, and it monitors their circuits and the resulting gear changes. When solenoid A doesn't respond electrically as expected — or the resulting shift doesn't happen correctly — this code is set. You may notice harsh, delayed, or missing shifts, or the transmission may enter a fail-safe (limp) mode. On Kia it is documented across 1 model: K5.
What are the most common causes of P0750?
The most common causes of P0750 are: Failed or stuck shift solenoid A, Open, shorted, or chafed solenoid wiring, Corroded or loose transmission connector, Low, dirty, or degraded transmission fluid, Clogged solenoid or valve body passages, Internal valve body or hydraulic fault, Faulty transmission control module (TCM). The specific cause varies by vehicle.
How much does it cost to fix P0750 on a Kia?
Repair costs vary widely with the root cause and Kia model; each issue on this page carries its own estimate where one is published.
Looking for P0750 on a different make?
View P0750 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.