P0756: Shift Solenoid B Performance or Stuck Off
Can you still drive? Use caution. Some gears may not engage properly and shifts may be harsh. Avoid towing or heavy loads and get the issue diagnosed promptly.
What Does P0756 Mean?
Code P0756 means shift solenoid B is receiving commands from the TCM but is not performing correctly. The solenoid is mechanically stuck or the hydraulic circuit it controls is blocked. This performance code often responds to a fluid change if contamination is the cause, making it important to check fluid condition before condemning the solenoid.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Solenoid B mechanically stuck
- Varnish buildup from degraded fluid
- Clogged valve body passage
- Worn solenoid bore in valve body
- Debris lodged in solenoid
Symptoms
- Check engine light on
- Skipped shifts or missing gears
- Harsh shifting in certain gear ranges
- Transmission slipping under load
- Increased transmission temperature
Diagnostic Steps
- 1Check transmission fluid for discoloration, smell, and debris
- 2Verify solenoid B resistance is within specification
- 3Actuate solenoid B with scan tool and verify audible click
- 4Remove solenoid and check for free movement of the plunger
- 5Inspect valve body for clogged passages
- 6Perform transmission fluid exchange and retest
Recommended Parts & Tools
shift solenoid pack
transmission fluid
transmission filter kit
valve body gasket set
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $150 - $1000 |
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Chat with AI About P0756Commonly Affected Vehicles
Related Recalls
1 Active Recall — 2026 Toyota Corolla
The following NHTSA safety recalls have been issued for this vehicle. Contact your dealer to check if your vehicle is affected.
EXTERIOR LIGHTING:HEADLIGHTS
Toyota Motor Engineering & Manufacturing (Toyota) is recalling certain 2026 Corolla vehicles. The front headlights may have missing headlight aim markings, which can result in improperly aimed headlights during service. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps, Reflective Devices, and Associated Equipment."
Remedy: Dealers will replace both front headlight assemblies, free of charge. Owner notification letters are expected to be mailed April 12, 2026. Owners may contact Toyota's customer service at 1-800-331-4331. Toyota's number for this recall is 26TA05.
Data provided by the National Highway Traffic Safety Administration (NHTSA).
Frequently Asked Questions
Should I try a fluid change before replacing the solenoid?
Yes, especially if the fluid is dark, burnt-smelling, or has not been changed at regular intervals. Fresh fluid can sometimes free a stuck solenoid. If the code returns after a fluid change, the solenoid likely needs replacement.
Can heat cause solenoid performance issues?
Yes. Excessive transmission heat degrades fluid faster, creating varnish and deposits that clog solenoid valves. An overheating transmission should be investigated for root causes like a failed cooler.
Community Fix Reports
Community reports are user-submitted and not verified by Auto AI Buddy. Results may vary.
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