BMW
Fuel pressure too low during cold start (bank 1). Long cranking or rough start; high-pressure pump on N54/N55.
P15DF fault code: what it means
P15DF: Fuel pressure too low during cold start (bank 1). Long cranking or rough start; high-pressure pump on N54/N55.
Usual causes, most likely first
- weak high-pressure fuel pump
- weak in-tank pump
- leaking injector
P15DF by make
Mini
Fuel pressure too low during cold start (bank 1). Long cranking or rough start; high-pressure pump on N14/N18.
What the repair usually costs
- High-pressure fuel pump (GDI petrol or common-rail diesel)NZ$1,140–NZ$4,280 · A$1,060–A$3,800
- Glow plugs (diesel, set of 4)NZ$250–NZ$850 · A$250–A$850
Not sure what P15DF means on your car? Ask Credov.
Before you clear it
Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.
Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.