P1166 AUDI Possible Causes
- High fuel pressure – Blocked return system or faulty pressure regulator
- Faulty fuel injector
- EVAP purge solenoid stuck open
- Misfiring cylinder
- Fix other codes first
How to fix P1166 AUDI code?
Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Engine light on (or engine service warning light soon)
P1166 AUDI Meaning
Bank 1 Fuel Balance Long Term Range 2 Upper Rich Limits Exceeded is the generic description for Audi P1166 code, but the manufacturer may have a different description for your vehicle model and year. Currently, we don’t have more information about the Audi P1166 OBDII code.