Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Code P0755 - Shift Solenoid "B" Problem
The 4T60E is an electronically shifted transaxle. Within transaxle are 4 solenoids for shift and TCC control. Solenoid "A" is energized for 1st and 4th gear operation. Solenoid "B" is energized for 1st gear as well as all 2nd gear operations. The other 2 solenoids are for TCC operation. This trouble code chart deals with shift control solenoids only. When ignition is turned on, both solenoids "A" and "B" receive battery voltage. Control module will ground both solenoid drivers for 1st gear until a shift to 2nd gear is commanded. When vehicle speed and TPS reach calibrated values, control module will turn off ground for solenoid "A" and 2nd gear is engaged. Further increase in vehicle speed will cause control module to turn off ground for solenoid "B", engaging 3rd gear. When appropriate speed is reached, control module will again ground solenoid "A" and 4th gear is engaged.
All PRNDL indications are ignored as far as transaxle shifting is concerned except for manual low gear. If PRNDL inputs indicate manual low has been selected, control module will keep both solenoids "A" and "B" energized until about 5400 RPM, when control module will force a shift by de-energizing solenoid "A". Manual 2nd and manual 3rd are controlled hydraulically within transaxle. Code 755 will not cause "SERVICE ENGINE SOON" light to illuminate. When Code 755 is set, transaxle will be forced into 3rd gear. If code is due to a grounded solenoid "B" driver circuit, only 1st and 2nd gear operation will be available. If code is due to an open in solenoid "B" driver circuit, only 3rd and 4th gear will be available. When fault goes away, normal operation will be available for balance of key cycle.
| Solenoid | Temp. F° (C°) | Ohms |
|---|---|---|
| Shift A & B | 68 (20) | 20-30 |
| Shift A & B | 190 (88) | 23-50 |
| TCC Apply | 68 (20) | 20-30 |
| TCC Apply | 190 (88) | 23-50 |
| TCC PWM | 68 (20) | 10-15 |
| TCC PWM | 190 (88) | 11-25 |
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.