P1139 CADILLAC Possible Causes
- Faulty HO2S, Bank 1 Sensor 2
- Open or short circuit in Bank 1 Sensor 2 HO2S harness
- Poor electrical connection in Bank 1 Sensor 2 HO2S circuit
How to Fix P1139 CADILLAC Code?
Start by checking the “possible causes” listed above. Visually inspect the corresponding cable harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Engine light on (or soon-to-be-service engine warning light)
P1139 CADILLAC Meaning
HO2S Insufficient Switching, Bank 1 Sensor 2 is the generic description for Cadillac 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 Cadillac code.