Aug 7, 2008 · lbz throwing code po403 1 reading Jump to Latest 14K views 30 replies 21 participants last post by steakman Mar 5, 2011

Aug 11, 2007 · started my 07 Classic LBZ this morning and the check engine light came on. It is setting code P0403 which is EGR malfunction. ???? i had to let the truck idle last night for …

Oct 29, 2011 · I was looking for feedback from anyone that has knowledge in this EGR code or function. First some background. A few weeks ago the engine light came on, scantool told me …

I pulled code PO403. I changed out both the solenoid an EGR valve twice. Tried to clear the codes with a computer cannot clear the check engine light. Not sure where to go from her.

Apr 25, 2020 · Did this start after pressure washing? If so, check all connections for water. I looked up every code. I looked up each code and the P0141, 155, and 161 start with saying …

Sep 20, 2009 · I bought a used truck earlier this year (December/January) with about 94K miles. Shortly after it started throwing P0403 codes. The dealer cleaned the EGR and the code came …

Jun 20, 2018 · Hi all, I have an ‘07 Sierra Classis Crew Cab 2500 with about 105k on it. Mostly stock with SBS cold air intake and Cat fuel filter kit. Had the dreaded P 0403 code come on. I …

Changed the EGR valve because I was getting a random misfire code and the engine was stalling. Now I am getting a po403 code and the engine still intermittently stalls.

EGR Valve Problem Changed The Egr Valve Because I Was Getting A Random Misfire Code And The Engine Was Stalling. Now I Am Getting A Po403 Code And The Engine... Asked by …

Feb 24, 2023 · My situation is very similar if not identical to the post by TYPE85 on Friday April 24, 2020, in regard to codes P0135, P0141, P0155, P0161, P0403 and P0443. I was driving …