P1139 BUICK Possible Causes
- Faulty HO2S, Bank 1 Sensor 2
- Open or short circuit in Bank 1 Sensor 2 HO2S wiring harness
- Poor electrical connection in Bank 1 Sensor 2 HO2S circuit
How to Fix P1139 BUICK 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)
P1139 BUICK Meaning
Insufficient HO2S Bank 1 Sensor 2 switching is the generic description for Buick P1139 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 P1139 Buick code.