O2 sensor bad?
Thread Starter
|
5th Wheeling
Joined: Mar 2022
Posts: 42
Likes: 4
O2 sensor bad?
I have a 2003 f250 sd v10, I was monitoring my short term fuel trims and at startup both banks go to 0.75 I’m assuming this is because the o2 sensors aren’t warm enough yet and it runs in rich, my question is that when bank 2 warms up and starts fluctuating bank 1 stays at 0.75 for about 3-4 minutes then finally starts, but banks 1 also goes back to 0.75 if I’m idling and or at low rpm for some time. I have monitored o2 sensor volts and sure enough bank2 starts reading well before bank 1, is this normal or do I have a bad o2 heater
