P1166 VOLKSWAGEN 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 Volkswagen P1166 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
- Check Engine Light on (or Service Engine Soon warning light)
P1166 VOLKSWAGEN Meaning
Bank 1 Long Term Fuel Trim Range 2 Rich Upper Limits Exceeded is the generic description for Volkswagen code P1166, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no further information about Volkswagen OBDII code P1166.