... Any help would be greatly appreciated. . My buddy's '97 Expedition's (5.4L) Check Engine light came on. We did a scan on it and came up with a P0141 code. Translated into English, it means "Heated Oxygen circuit fault. BANK 1, SENSOR 2." Can someone translate it into simpler English for me?? Does that mean the O2 sensor on the Driver's side (bank 1), after the cat (sensor 2)?? If anyone can shine some light on this, I'd really appreciate it. Thank you, fellas.