Shift Solenoid A Performance or Stuck Off
The P0751 code means the vehicle's onboard diagnostic system has detected: Shift Solenoid A Performance or Stuck Off. This is a critical severity code.
- Keep driving?
- No -- stop driving
- DIY difficulty
- hard
- Estimated cost
- $150 - $600 (parts and labor)
Read and clear transmission codes. Many trans codes are caused by low or burnt fluid -- check level and color before assuming the worst.
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Basic scanners only read engine codes. This reads transmission, ABS, and airbag too.
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Common Symptoms
- Check Engine Light illuminated
- Cannot shift into certain gears
- Transmission stuck in limp mode
- Harsh delayed shifts
Probable Causes (Ranked by Likelihood)
- Shift solenoid A stuck in off position Very High
- Clogged solenoid A from debris in fluid High
- Worn valve body bore for solenoid A Moderate
- Low transmission fluid pressure Low
Step-by-Step Diagnostic Procedure
-
Monitor shift solenoid A command vs actual state on scan tool
-
Check solenoid for mechanical sticking
-
Inspect transmission fluid for particles and contamination
-
Perform line pressure test
-
Replace solenoid A -- flush transmission if fluid is contaminated
Common Fixes by Vehicle
What techs usually find when diagnosing P0751 on specific vehicles — tap your vehicle for the fix and the exact part:
2001-2014 Honda Accord/Civic Automatic Easy (fluid), Advanced (solenoid) DIY
Shift solenoid A performance issues on Honda automatics are caused by solenoid coil resistance drift or varnish restricting solenoid plunger movement. Measure solenoid resistance (should be 12-25 ohms). If out of spec, replace the solenoid assembly (28250-RPC-003). Before replacement, try 3x drain-and-fill with Honda DW-1 ATF -- fresh fluid can dissolve varnish deposits that cause sticking.
Labor: 30 min (fluid), 3-4 hours (solenoid)2005-2017 Toyota Camry/RAV4 U250E Advanced DIY
SL1 solenoid performance on Toyota U250E/U760E transmissions is often caused by wear in the valve body bore rather than the solenoid itself. The solenoid plunger wears the aluminum bore, causing a pressure leak. A valve body replacement or bore repair kit (Sonnax) is the proper fix. Simply replacing the solenoid in a worn bore won't solve the problem long-term.
Labor: 4-6 hours2007-2018 GM Silverado/Tahoe 6L80E Advanced DIY
1-2 shift solenoid performance codes on the 6L80E are commonly caused by a worn valve body or a cracked solenoid filter screen. GM issued TSB 16-NA-390 covering valve body updates for 2014-2018 trucks. The valve body is accessible from below without removing the transmission. Replace the filter screens on all solenoids during the repair and refill with Dexron VI.
Labor: 4-6 hoursFrequently Asked Questions
Can I drive with code P0751?
Do not drive -- have the vehicle towed. Shift solenoid A performance or stuck off can cause the transmission to be stuck in the wrong gear or shift unpredictably.
What is shift solenoid A?
Shift solenoid A is an electro-hydraulic valve inside the transmission that controls fluid flow to engage specific gear combinations. It is commanded by the TCM to achieve proper shift timing.
Can I replace shift solenoid A without removing the transmission?
On most vehicles, shift solenoids are accessible by removing the transmission pan and sometimes the valve body. The transmission does not need to be removed from the vehicle.
Sources
This page is built from documented references. Verify against your own service info before repair work.
P0751 on Diesel, EV & Equipment
The same code ID appears across other engines and platforms. The diagnostic flow varies by manufacturer — these are the platform-specific breakdowns:
See All Codes & Fixes for Your Vehicle
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