P1139 CHEVROLET 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 Code P1139 CHEVROLET?
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 CHEVROLET Meaning
HO2S Insufficient Switching, Bank 1 Sensor 2 is the generic description for Chevrolet code P1139, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no further information about Chevrolet OBDII code P1139.