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P0755 — Shift Solenoid B Malfunction
SeriousTransmissionPower derate likely — plan to stop soon
Seen on: Heavy Truck
Shift Solenoid B Malfunction. Common causes: Shift solenoid B failure.
Don't risk it — get a diesel tech on the truck.
Your code rides along, so nearby mechanics see the fault before they quote you.
How serious is it?
Serious. Power derate likely — plan to stop soon.
Most likely causes
- Shift solenoid B failure
- Solenoid failure
- contaminated fluid
First moves (roadside)
- Check solenoid B resistance
- compare to spec
- replace if out of range
FAQ
What does P0755 mean?
Shift Solenoid B Malfunction. Common causes: Shift solenoid B failure.
How serious is P0755?
Serious — Power derate likely — plan to stop soon.
What's the most likely cause of P0755?
The most common cause is: Shift solenoid B failure. Other possibilities include Solenoid failure; contaminated fluid.
Can I keep driving with P0755?
Power derate likely — plan to stop soon. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
Throwing this code right now?
Find a mechanic or related guides
General diagnostic guidance for diesel engines (Cummins, Detroit, PACCAR, Volvo, Mack and more). Not a substitute for a scan-tool diagnosis on your specific truck.