mmartin061

Thanks everyone for the input. I am having trouble finding any SIDE guy here in Milwaukee willing to do any extensive research into this issue. Talked to another guy today and he also said if codes 0420 and 0430 are popping that I am doomed . Thr codes are pretty reliable and also to replace the sensors right along with them. Whether this is true or not he said OEM cats way better than aftermarket and that Japanese cars especially Yodas have very finicky cat systems and are somewhat notorius for going bad. He did cats on an 05 Highlander. Seems not really fair or right. That is right on the end of 8 years. He has no interest in anything because he is a referral. I tried a bottle of Redline after the light was reset. 300 miles light came back on 2 days later it is now off again. Maybe I will go another round with this or cat cleaner. Did I read somewhere to try and clean the MAF also?