Hi Jare. That is a puzzling one for sure. Sounds like you are going really lean and possibly overheating the O2 sensor. It is difficult to say though without seeing it. The best thing to do would be to have a scan tool connected to your vehicle to determine what your long and short fuel trim readings are showing. If you are showing excessively high positive fuel trims, it would be a clue that your engine has a potential vacuum leak or low fuel pressure that can't sustain adequate air-fuel ratios. This can elevate exhaust temperatures and cause damage.
What happen if the oxygen sensor filament keep burning. Thanks
I already changes five times . the filament keeps open tt no resistance. Only works 5 days burn again.
Dodge grand caravan 3.8L SXT
Hi Jare. That is a puzzling one for sure. Sounds like you are going really lean and possibly overheating the O2 sensor. It is difficult to say though without seeing it. The best thing to do would be to have a scan tool connected to your vehicle to determine what your long and short fuel trim readings are showing. If you are showing excessively high positive fuel trims, it would be a clue that your engine has a potential vacuum leak or low fuel pressure that can't sustain adequate air-fuel ratios. This can elevate exhaust temperatures and cause damage.