P0755 code meaning
Shift Solenoid B
Powertrain system Generic code P07xx codes Check engine light
What P0755 means
A shift solenoid is an electrically switched valve in the valve body. Manufacturers use these codes differently: Ford reports an open circuit with the base code and shorts separately, newer GM units have separate low/high codes, and the letter is not tied to a valve number (Saab's 9-5: A = valve S2). P0755 is the general code for solenoid B, used in practice like P0750 for an open circuit: Ford flags driver feedback disagreeing with the command for 0.5–5 s, with shorts as P0976/P0977; on Ford's 6R80 solenoid B is the proportional valve of the clutch for third, fifth and reverse. Ram's 6.7 L calls it 'control circuit open'. GM uses P0758 or P0976/P0977 instead. The transmission enters limp mode with harsh shifts.
P0755 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0755
- Check engine or transmission warning lamp
- Limp mode in a fixed gear, no upshifts
- Harsh shifts from maximum line pressure
Common causes of P0755
- Most likelyOpen or corroded wire or transmission pass-through connector
- PossibleSolenoid coil open or shorted
- PossibleInternal harness or electronic module in the transmission
- Less likelyModule driver faulty or valve supply missing
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Shift solenoidTransmission valve bodyTransmission wiringTransmission control module
What each part of P0755 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 7 | Area: transmission. |
| 55 | The exact fault in that area. |
What to do next
- Note P0755 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0755
What does P0755 mean?
P0755 means "Shift Solenoid B". A shift solenoid is an electrically switched valve in the valve body. It is a generic code, so it means the same on every make.
Is it safe to drive with P0755?
Drive gently and only to a workshop. With P0755 the car can go into limp mode (reduced power) to protect itself.
Will P0755 fail an emissions test?
Yes, it can. P0755 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0755 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P0755 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.