P0963 — Pressure control solenoid A — voltage high
What it means: Pressure control solenoid A — voltage high.
How serious / can you keep driving: Serious. Power derate likely — plan to stop soon.
Check first: Unplug — invert
Don't risk it — look up listed providers near you and give them this code when you call.
Listed providers nearest Indianapolis, IN
Closest first. Tell them P0963 and what the truck is doing. RoadService.app lists these providers and does not employ them or carry out the repair.
- 0.0 mi away — based in Indianapolis, IN · (317) 789-5002
- 0.0 mi away — based in Indianapolis, IN · (317) 300-7000
- 0.0 mi away — based in Indianapolis, IN · (317) 646-8208
What P0963 means
Pressure control solenoid A — voltage high. Common causes: Open solenoid|Wire open.
How serious is it?
Serious. Power derate likely — plan to stop soon.
Most likely causes
- Open solenoid
- Wire open
First moves (roadside)
- Unplug — invert
FAQ
Pressure control solenoid A — voltage high. Common causes: Open solenoid|Wire open.
Serious — Power derate likely — plan to stop soon.
The most common cause is: Open solenoid. Other possibilities include Wire open.
Power derate likely — plan to stop soon. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
Related codes
Codes that commonly appear alongside P0963, or share the same subsystem.
- Main shaft speed erratic (SPN 160 FMI 2)
- Input shaft speed erratic (SPN 161 FMI 2)
- Transmission output retarder speed erratic (SPN 162 FMI 2)
- Trans oil temperature very high (SPN 177 FMI 0)
- Trans oil temperature voltage high (SPN 177 FMI 3)
- Trans oil temperature voltage low (SPN 177 FMI 4)
- Engine speed signal abnormal update rate (SPN 190 FMI 9)
- Transmission output shaft speed erratic (SPN 191 FMI 2)
Same symptom: Charging and voltage
Other codes that trace back to voltage — one bad ground can set half a dozen of them at once.
- Trans oil pressure voltage high (SPN 1762 FMI 3) · Drivetrain & Transmission
- Trans oil pressure voltage low (SPN 1762 FMI 4) · Drivetrain & Transmission
- Trans fluid temp — voltage low (P0712) · Drivetrain & Transmission
- Trans fluid temp — voltage high (P0713) · Drivetrain & Transmission
- Trans pressure sensor B — voltage low (P0847) · Drivetrain & Transmission
- Trans pressure sensor B — voltage high (P0848) · Drivetrain & Transmission
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.