P0751 on Hyundai: How to Diagnose & Fix
Shift Solenoid A Performance/Stuck Off
1 Hyundai model · 1 documented issue · $100-$3,000 repair
P0751 on Hyundai by model: symptoms, diagnosis and fix
The 2006-2011 Hyundai Azera with the 5-speed or 6-speed automatic transmission develops shift hesitation, particularly a noticeable 1-2 shift delay under wide-open throttle when cold. The torque converter lockup clutch also develops shudder during light-throttle cruising at 35-55 mph. Hyundai issued service bulletins for harsh and/or delayed shifts (TSB 0740010, GDS analysis) and a procedure for resetting the automatic transaxle adaptive values (0540004). If the transmission fluid is not changed regularly, the shudder progressively worsens and can lead to torque converter failure or internal transmission damage. The Azera shares its transmission with the Sonata and Santa Fe of the same era.
Common Symptoms
- Delayed or hesitant 1-2 upshift, especially when cold
- Shudder or vibration at 35-55 mph during light throttle
- Harsh shift from 2nd to 3rd gear
- Transmission slipping sensation on acceleration
- Check engine light with transmission-related codes
- Hesitation as if transmission cannot decide whether to shift
How to Fix
What to check first: have a Hyundai dealer, or a shop with Hyundai's GDS scan tool, read the transmission codes and live transmission data before anyone replaces parts. Hyundai published several service bulletins for this transaxle. Ask for them by number: - TSB 07-40-010 (May 2008), "Automatic transaxle harsh and/or delayed upshift or downshift - GDS analysis." This bulletin covers harsh or delayed upshifts and downshifts. - TSB 05-40-004 (March 2006), "Resetting automatic transaxle adaptive values." In this procedure the transaxle control module is reset and relearns its shift adaptation. - TSB 07-40-009 (August 2007), for harsh or delayed engagement into Drive or Reverse. - If the check engine light is on: TSB 07-40-016 covers transaxle codes P0715-P0722 (speed sensor circuits), 09-AT-013 covers range switch codes P0705, P0707 and P0708, and 09-AT-018 covers solenoid codes P0740-P0770. A good request to the shop: "Diagnose per TSB 07-40-010 with GDS, check the fluid level and condition, and do the adaptive reset in TSB 05-40-004." These are technical service bulletins, not safety recalls. If the problem keeps coming back, the transmission may be failing internally. In one owner report, a 2007 Azera Limited jerked at 15, 30 and 45 mph and went back to the dealer three times before its 100,000-mile powertrain warranty ran out. Each visit, including a reset of the transmission computer, fixed it only for a while. At about 120,000 miles the car lost drive and had to be towed, and the dealer found the transmission had failed. The fluid had been changed twice. CarComplaints lists a typical repair cost of $2,800 for 2007 Azera transmission jerking.
Sources for this issue (6)
- NHTSA Vehicle Page for 2006 Hyundai Azera - Includes complaints related to transmission issuesnhtsa
- Hyundai TSB 0740010 (Harsh and/or Delayed Upshift or Downshift, GDS Analysis) and 0540004 (Resetting Automatic Transaxle Adaptive Values) - 2006 Azera TSB listtsb
- Hyundai TSB 0740010: Automatic transaxle harsh and/or delayed upshift or downshift - GDS analysis (2006 Azera)tsb
- Hyundai TSB 0540004: Resetting automatic transaxle adaptive values (2006 Azera)tsb
- Hyundai TSB 0740009: Automatic transaxle harsh and/or delayed engagement into Drive or Reverse (2006 Azera)tsb
- 2007 Hyundai Azera transmission jerking owner complaint (CarComplaints)owner-report
P0751 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 P0751 mean on a Hyundai?
P0751 stands for "Shift Solenoid A Performance/Stuck Off." This code means the transmission control module commanded Shift Solenoid A (sometimes called Shift Solenoid 1) but the transmission did not respond properly, with the solenoid acting as though it is stuck 'off.' Shift solenoids are electrically operated valves that direct hydraulic fluid pressure to engage gears, so when one underperforms the transmission may shift harshly, slip, or fail to change gears at the right time. The computer sets this code when the measured gear ratio or shift behavior does not match the commanded state. It generally indicates a hydraulic or performance issue with the solenoid or the fluid circuit it controls inside the automatic transmission. On Hyundai it is documented across 1 model: Azera.
What are the most common causes of P0751?
The most common causes of P0751 are: Stuck or failed Shift Solenoid A, Low, dirty, or degraded transmission fluid, Clogged solenoid screen or valve body passages, Sticking or worn valve body components, Wiring or connector problem at the solenoid, Internal transmission mechanical wear, Faulty transmission control module. The specific cause varies by vehicle.
How much does it cost to fix P0751 on a Hyundai?
Published repair estimates on Hyundai range from $100 to $3,000 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.