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P0755 Toyota

P0755 Toyota - Shift Solenoid 'B' Malfunction

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P0755 Toyota Comments |  Add Comment
Possible causes
- Low transmission fluid level
- Dirty transmission fluid
- Faulty shift solenoid 'B' valve
- Shift solenoid 'B' valve harness is open or shorted
- Shift solenoid 'B' valve circuit poor electrical connection
Help with Possible causes What does this mean?
Tech notes
When the a transmission solenoid is malfunction, in most cases the problem is not the electrical part of the solenoid; the problem is foreign material obstructing the mechanical function of the solenoid or the flow of the fluid through the transmission valve body. If the transmission fluid is very dirty, it is recommend changing the transmission fluid and if possible removing the transmission pan for further diagnosis. Excessive debris or metal particles on the transmission pan could be an indication that there is a transmission mechanical failure and that the transmission will need to be rebuilt or replaced.
Help with Tech Notes What does this mean?
When is the code detected?
The P0755 code is detected when TCM detects an improper voltage drop when it tries to operate the solenoid valve.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Transmission will not shift gears.
P0755 Toyota Description

Shift solenoid valve B is turned ON or OFF by the Transmission Control Module (TCM) in response to signals sent from the park/neutral position (PNP) switch, vehicle speed and Engine Control Module (ECM) (throttle opening). Gears will then be shifted to the optimum position.

P0755 Toyota Information for specific Toyota models
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TOYOTA Technical Service Bulletins for P0755 code
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