P0755 Shift solenoid B
What P0755 means
The transmission control unit has found an electrical or performance fault with shift solenoid B. The gearbox may not shift into certain gears and can go into limp mode.
P0755 is a generic SAE J2012 code: it means the same on every make. The exact cause still depends on the car, so read the freeze-frame data before replacing parts.
At a glance
- Severity
- Medium
- Typical repair cost
- 150–700 €
- Workshop time
- 1.5–8 h
- Repair difficulty
- Hard
- DIY possible
- No
- Check engine light
- Yes
- Affects emissions test
- No
- Limp mode possible
- Yes
Parts and labour at an independent workshop in Europe. Main dealers charge more; the cause decides the bill, not the code.
Symptoms
- Harsh or wrong gear changes
- Missing gears
- Gearbox stuck in one gear
- Transmission warning on
Common causes
- Failed shift solenoid B
- Damaged internal wiring harness or connector
- Low or contaminated transmission fluid
- Valve body fault
Can I keep driving with P0755?
You can drive carefully, but have it checked within one to two weeks.
What to check first
- Check transmission fluid level and condition
- Inspect the gearbox connector
- Measure the solenoid resistance and command it with a scan tool
- Replace the solenoid, solenoid pack or harness
Related codes
- P0750 Shift solenoid A
- P0760 Shift solenoid C
- P0765 Shift solenoid D
- P0743 Torque converter clutch circuit electrical
- P0741 Torque converter clutch circuit performance/stuck off
- P0740 Torque converter clutch circuit/open
- P0770 Shift solenoid E
- P0735 Gear 5 incorrect ratio
Data: TORKO fault-code catalogue, built on OBDex (CC0-1.0) and reviewed against workshop practice. Informational only — it does not replace a diagnosis by a mechanic.
Updated: