P0263 — Cylinder 1 Contribution/Balance Fault
Seen on: Cummins · Detroit · Navistar
Cylinder 1 Contribution/Balance Fault. Common causes: Faulty injector cylinder 1, low compression.
Your code rides along, so nearby mechanics see the fault before they quote you.
How serious is it?
Caution. Limp to the next safe stop.
Most likely causes
- Faulty injector cylinder 1
- low compression
- Injector electrical harness fault
- injector stiction
FAQ
Cylinder 1 Contribution/Balance Fault. Common causes: Faulty injector cylinder 1, low compression.
Caution — Limp to the next safe stop.
The most common cause is: Faulty injector cylinder 1. Other possibilities include low compression; Injector electrical harness fault; injector stiction.
Limp to the next safe stop. When in doubt, get a qualified mobile diesel tech on the truck before continuing.
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.