Hi, I'm new to the forum and did some searching but couldn't find the answer I need. Hope you can help!
I have a 2005 Pontiac Montana Extended Base (not the sport model) with a V6 3.4 litre engine.
I have a "check engine light" also known as "service engine soon" light. It'* on steady, not flashing. So I used an OBDII scan tool to pull off the code and it says:
"P0135 Heated Oxygen Sensor (HO2S) Heater Performance Bank 1 Sensor 1"
So I'm guessing I have to replace the oxygen sensor...fine. But does anyone know where Bank 1 Sensor 1 is located on this model vehicle??? I can't afford to replace all of them so I need to narrow it down...any help would be greatly appreciated!