C0387 — Electronic Brake Proportioning Performance
What it means: Electronic Brake Proportioning Performance.
How serious / can you keep driving: Caution. Limp to the next safe stop.
Check first: Check all WSS inputs
Don't risk it — look up listed providers near you and give them this code when you call.
Listed providers nearest Ocala, FL
Closest first. Tell them C0387 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 Ocala, FL · (352) 830-1899
- 0.0 mi away — based in Ocala, FL · (352) 620-0740
- 0.0 mi away — based in Ocala, FL · (352) 497-0277
Seen on: Heavy Truck
What C0387 means
Electronic Brake Proportioning Performance. Common causes: EBP system not meeting performance target.
How serious is it?
Caution. Limp to the next safe stop.
Most likely causes
- EBP system not meeting performance target
- Brake imbalance
- WSS fault affecting EBP
First moves (roadside)
- Check all WSS inputs
- verify brake balance front-to-rear
FAQ
Electronic Brake Proportioning Performance. Common causes: EBP system not meeting performance target.
Caution — Limp to the next safe stop.
The most common cause is: EBP system not meeting performance target. Other possibilities include Brake imbalance; WSS fault affecting EBP.
Limp to the next safe stop. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
Related codes
Codes that commonly appear alongside C0387, or share the same subsystem.
- Service brake air pressure — primary circuit low (SPN 519 FMI 4)
- Service brake air pressure — secondary circuit low (SPN 520 FMI 4)
- Left front wheel speed sensor erratic (SPN 789 FMI 2)
- Left front wheel speed abnormal signal (SPN 789 FMI 8)
- Right front wheel speed sensor erratic (SPN 790 FMI 2)
- Right front wheel speed abnormal (SPN 790 FMI 8)
- Left rear (LF drive) wheel speed erratic (SPN 791 FMI 2)
- Left rear wheel speed abnormal (SPN 791 FMI 8)
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.