What Does P0755 Mean?
Shift solenoid B has a general malfunction. Shift solenoid B typically controls the 2-3 shift or works in conjunction with solenoid A for multiple gear changes. A malfunction in this circuit means the TCM cannot properly control gear selection, often resulting in limp mode or failure to shift into certain gears.
Safety Warning
The transmission may enter limp mode or fail to shift into certain gears. The vehicle can be driven slowly to a shop but normal driving speeds may not be achievable. Repair as soon as possible.
Common Causes
30%
Shift solenoid B electrical failure (open or shorted coil)
25%
Wiring or connector issue in the shift solenoid B circuit
20%
Contaminated transmission fluid causing solenoid to stick mechanically
15%
Corroded or damaged transmission connector pins for solenoid B circuit
10%
TCM/PCM driver circuit failure for solenoid B output
Diagnostic Steps
1
Check transmission fluid level and condition — contaminated fluid is a common cause of solenoid malfunctions.
2
Measure shift solenoid B resistance at the transmission connector — compare to manufacturer specifications.
3
Inspect the transmission connector for corrosion, water intrusion, or damaged pins on the solenoid B circuit.
4
Perform continuity and short-to-ground tests on the solenoid B wiring from the TCM to the transmission.
5
If electrical tests pass but the code persists, remove the solenoid and inspect for mechanical sticking or debris.
Estimated Repair Cost
$150 - $1,500
Parts + labor, varies by vehicle and location
Shift solenoid B has a general malfunction. Shift solenoid B typically controls the 2-3 shift or works in conjunction with solenoid A for multiple gear changes. A malfunction in this circuit means the TCM cannot properly control gear selection, often resulting in limp mode or failure to shift into c...
The most common cause of P0755 (Shift Solenoid B Malfunction) is: Shift solenoid B electrical failure (open or shorted coil)
Typical repair costs for P0755 range from $150 to $1,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The transmission may enter limp mode or fail to shift into certain gears. The vehicle can be driven slowly to a shop but normal driving speeds may not be achievable. Repair as soon as possible.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0755 to identify the root cause.
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Quick Info
Category
Powertrain
System
Automatic Transmission — Shift Control
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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