What does it mean?
- Low fuel pressure
- Large vacuum leak in the engine
- Faulty mass air flow (MAF) sensor
- Faulty ignition
- Faulty fuel injector
How to fix BMW P1090 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
Engine light on (or engine service warning light soon)
P1090 BMW Meaning
Pre-catalyst fuel too lean, bank 1 is the generic description of BMW P1090 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we do not have more information about the OBDII P1090 BMW code.