The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - eBay Long Tube header install... pics inside

biggsteve97 · 03-20-2011, 06:04 PM

Ok, so I have driven my Tahoe for over a week now with no issues since installing the header kit but about 2 hours ago the service engine light came on. When I put the scanner on I found 2 codes, I had both cat efficiency codes (PO420 and PO430). Has anyone else had this happen with this kit? I am hoping I just need new O2 sensors, but if not I guess I will need to look into a custom tune a whole hell of alot sooner than I had hoped.

03-20-2011, 06:04 PM	#22
biggsteve97 Registered User Join Date: Jan 2010 Location: Kansas City, Mo Posts: 284	Re: eBay Long Tube header install... pics inside Ok, so I have driven my Tahoe for over a week now with no issues since installing the header kit but about 2 hours ago the service engine light came on. When I put the scanner on I found 2 codes, I had both cat efficiency codes (PO420 and PO430). Has anyone else had this happen with this kit? I am hoping I just need new O2 sensors, but if not I guess I will need to look into a custom tune a whole hell of alot sooner than I had hoped.