Joined
·
6 Posts
Hi all, first post here, been lurking for a while, cool site with lots of info...I have an 03 Durango, 4.7L, 117,000 miles, I recently replaced the exhaust from the manifolds back (and the driverside manifold) with a Dynomax system, also I replaced the O2 sensor on both sides of the converter (Bosch from Napa) since then the CEL has been on, its spitting out this code:
P0420 (M) 1/1 Catalytic Converter Efficiency Catalyst 1/1 efficiency below required level.
I've checked and double checked the manifolds to verify no leaks, I've reset the CEL twice and within 120 miles its back on, WHY??? I've read that the Bosch 02 sensors are not the best idea, they say to go with Dodge sensors only, any truth to that? I'm at a loss and have a week to sort this out and get an inspection sticker, any help would be most appreciated!
Ryan
P0420 (M) 1/1 Catalytic Converter Efficiency Catalyst 1/1 efficiency below required level.
I've checked and double checked the manifolds to verify no leaks, I've reset the CEL twice and within 120 miles its back on, WHY??? I've read that the Bosch 02 sensors are not the best idea, they say to go with Dodge sensors only, any truth to that? I'm at a loss and have a week to sort this out and get an inspection sticker, any help would be most appreciated!
Ryan