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P0848 — Trans pressure sensor B — voltage high
SerioustransmissionPower derate likely — plan to stop soon
Trans pressure sensor B — voltage high. Common causes: Open sensor|Wire open.
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
- Open sensor
- Wire open
First moves (roadside)
- Unplug — invert
FAQ
What does P0848 mean?
Trans pressure sensor B — voltage high. Common causes: Open sensor|Wire open.
How serious is P0848?
Serious — Power derate likely — plan to stop soon.
What's the most likely cause of P0848?
The most common cause is: Open sensor. Other possibilities include Wire open.
Can I keep driving with P0848?
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.