Shift Solenoid A Malfunction
The P0750 code means the vehicle's onboard diagnostic system has detected: Shift Solenoid A Malfunction. 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
- Transmission stuck in one gear
- Harsh shifting
- Limp mode activated
Probable Causes (Ranked by Likelihood)
- Failed A shift solenoid Very High
- Wiring issue in solenoid A circuit High
- Contaminated transmission fluid clogging solenoid Moderate
- TCM solenoid A driver fault Low
Step-by-Step Diagnostic Procedure
-
Measure shift solenoid A resistance -- typically 10-25 ohms
-
Command solenoid A with scan tool and listen for click
-
Inspect solenoid wiring at transmission connector
-
Check transmission fluid for contamination
-
Replace shift solenoid A if electrically or mechanically faulty
Common Fixes by Vehicle
What techs usually find when diagnosing P0750 on specific vehicles — tap your vehicle for the fix and the exact part:
2001-2012 Honda Accord/Civic Automatic Advanced DIY
Shift solenoid A (SS-A) failure on Honda automatics causes harsh 1-2 shifts or no first gear. The solenoid is inside the transmission on the valve body. Measure resistance at the transmission connector -- should be 12-25 ohms. If open or shorted, remove the trans pan and replace the solenoid.
Labor: 2-4 hours2004-2016 Toyota Camry/RAV4 U250E Advanced DIY
Shift solenoid S1 on the Toyota U250E transmission sticks from varnish buildup in old ATF. Drain and refill with Toyota WS fluid first. If the code returns, the solenoid must be replaced. The solenoid is on the valve body inside the transmission pan. Replace all solenoids at once as a set.
Labor: 3-5 hours2003-2015 Nissan Altima/Maxima RE5F22A Advanced DIY
Shift solenoid A on the Nissan 5-speed auto (RE5F22A) fails from debris in contaminated fluid. Check for metal debris on the transmission pan magnet. If present, the transmission has internal damage beyond just the solenoid. A fluid change and solenoid replacement may buy time but a rebuild may be needed.
Labor: 3-5 hoursFrequently Asked Questions
Can I drive with code P0750?
Do not drive -- have the vehicle towed. Shift solenoid A malfunction 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.
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