Volvo
Engine running lean at higher load (bank 1). Usually fuel delivery or a boost/vacuum leak.
P2191 fault code: what it means
P2191: System too lean at higher load, bank 1: the engine runs lean under acceleration.
Usual causes, most likely first
- weak fuel pump or blocked fuel filter
- dirty MAF sensor
- boost or intake leak (turbo engines)
P2191 by make
What the repair usually costs
- MAF (mass air flow) sensor replaceNZ$170–NZ$660 · A$160–A$600
- Full / logbook service (SUV / diesel ute / 4WD)NZ$410–NZ$800 · A$400–A$780
- Diesel fuel filter replacement and primeNZ$130–NZ$350 · A$130–A$340
- Diesel fuel filter replacement (European diesel)NZ$160–NZ$410 · A$150–A$390
Not sure what P2191 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.