Mar 4, 2020 · P0404 Modules: ECM Description: Exhaust Gas Recirculation (EGR) Open Position Performance P0404 has nothing todo with your EGR cooler. If the PCM determines that the …

If P0401 or P0404 are set and there is a customer concern of low power or black smoke, monitor the EGR valve and MAF sensor readings during the concern. A sticking EGR valve or skewed …

Sep 17, 2008 · I have cleaned the MAF sensor with MAF cleaner multiple times cause I have read here that the K&N oil may mess with the MAF and Code. I didn't get the P0404 at first now i …

May 16, 2007 · P0101, P0401, P0404 codes Jump to Latest 7.9K views 1 reply 2 participants last post by stacks04 May 17, 2007 Duramaxdoc Discussion starter

May 14, 2012 · p0401-exhaust gas recirculation flow insuff detected. p0404-exhaust gas recirculation circuit range/performance. p0299-turbo charger underboost. All three of these …

May 16, 2010 · Everytime I start my truck within 5 min of driving it throws a CEL and this is what pops up (P1404&P0404). I thought at first maybe the EGR motor was shot so I replaced that …

Jul 5, 2006 · P0401 - EGR Flow Insufficient P0404 - EGR Open P0299 - Turbo Under Boost I am getting these codes about once a week. Sometimes all three together and at other times just …

Jul 25, 2015 · LLY throwing P0101, P0102, P0401, P0404 codes LLY: Jump to Latest 9.6K views 13 replies 5 participants last post by dkperez Aug 5, 2015

Oct 1, 2008 · P0401 & P0404 Code Jump to Latest 13K views 10 replies 9 participants last post by cristango Oct 1, 2008 HOUNDDOG Discussion starter

Feb 3, 2010 · Another P0404 question. I have a 03' CA Equipped LB7. Has a P0404 that will only clear for a few drive cycles, and then comes right back on. Mods are 4" cat back, exhaust …