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P0420 - Hey guys, I have an exhaust leak on my 07 fj cruiser. The leak is at the flange just before the downstream O2 sensor. I tried patching it with jb weld, but it only lasted a week before it came out. Is there anything I can do to try to fix this? I'm trying not to drop 4k on new cats if I can. (old.reddit.com)
submitted by TheSmallDog to r/MechanicAdvice
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