P1139 SUBARU Possible Causes
- Faulty front A/F oxygen sensor 11
- Front A/F oxygen sensor 11 harness is open or shorted
- Poor electrical connection in the front A/F oxygen sensor 11 circuit
How to Fix P1139 SUBARU 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 service engine soon warning light)
P1139 SUBARU Meaning
The Front A/F Oxygen Sensor Heater Control Circuit Malfunction (Bank 1 Sensor 1) is the generic description for Subaru code P1139, but the manufacturer may have a different description for your specific model and vehicle year. Currently, we do not have more information about the OBDII P1139 Subaru code.