P1139 AUDI Possible Causes
- Faulty O2 sensor
- High fuel pressure
- Faulty mass air flow (MAF) sensor
- O2 sensor harness is open or shorted
- Poor electrical connection in the O2 sensor circuit
How to Fix P1139 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
- Check engine light on (or service engine soon warning light)
P1139 AUDI Meaning
Fuel System Too Rich Bank 2 is the generic description for Audi P1139 code, but the manufacturer may have a different description for your model and vehicle year. Currently, we don’t have more information about the Audi P1139 OBDII code.