P1091 MINI Possible Causes
- Low fuel pressure
- Large vacuum leak in the engine
- Faulty mass air flow (MAF) sensor
- Faulty ignition
- Faulty fuel injector
How to Fix P1091 MINI Code?
Start by checking the “possible causes” listed above. Visually inspect the wiring harness and corresponding connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
Check engine light on (or service engine soon warning light)
P1091 MINI Meaning
Pre-catalyst fuel trim too rich, bank 1 is the generic description for the P1091 Mini code, but the manufacturer may have a different description for your vehicle model and year. Currently, we do not have more information about the P1091 Mini OBDII code.