Ford
Fuel rail pressure sensor range/performance: the rail pressure reading does not make sense to the engine computer.
P0191 fault code: what it means
P0191: Fuel rail pressure sensor reading is outside the expected range.
Usual causes, most likely first
- faulty fuel rail pressure sensor
- corroded sensor wiring or connector
- real fuel pressure fault (pump, filter, regulator)
P0191 by make
GWM
Fuel rail pressure sensor range/performance.
Isuzu
Fuel rail pressure sensor range/performance.
LDV
Fuel rail pressure sensor range/performance.
Mitsubishi
Rail pressure sensor reading out of range, or not matching the pump command (4N15).
What the repair usually costs
- CVT valve body replacement (remanufactured, in car)NZ$1,280–NZ$2,420 · A$1,200–A$2,400
- A/C compressor replace incl. drier and flush (European)NZ$1,560–NZ$3,200 · A$1,490–A$3,050
- High-pressure fuel pump (GDI petrol or common-rail diesel)NZ$1,140–NZ$4,280 · A$1,060–A$3,800
Not sure what P0191 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.