I had the IPDM relay failure in Nov 2010 which then resulted in the p0420/0430 codes = $1400 in expenses from me to get everything lined out. The relay has been recalled (Nissan has yet to contact me to inform me of this but the dealership covered the relay replacement after I took it in to be replaced with their relay instead of the one I bought for $4) yet Nissan is refusing to cover my expenses related to the recall. I had 2 hours labor locally ($120) plus $89 @ dealer to confirm what I already told them was wrong. William from consumer affairs called and only said he wanted to talk about my recent survey; skirted the issue, said Nisssan cannot do anything for me and closed my account. The only person who said the IPDM is not related to the cats failing (after dumping fuel through motor and into cats after hours of trying to get it running, dieseling,etc....) was the tech William says he spoke with. Dealer, repair shop and exhaust shop all say it is related. Regardless, Nissan should cover my expenses incurred due to the IPDM failure alone of $209 plus reimburse my insurance provider for the tow. They will do nothing for me !!!