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Rogelio Lozano May 17, 2019 09:05 PM
Please help
 
Been having problem with my 03 Mitsubishi Lancer oz rally I get 2 codes p0171 and p0401 I’ve changed the egr all the lines that are in the egr system also when I check the on board data it’s saying it keeps going in and out of open loop every 5 seconds

xCasserole 420 May 20, 2019 06:46 PM
Originally Posted by Rogelio Lozano (Post 11872899)
Been having problem with my 03 Mitsubishi Lancer oz rally I get 2 codes p0171 and p0401 I’ve changed the egr all the lines that are in the egr system also when I check the on board data it’s saying it keeps going in and out of open loop every 5 seconds
It sounds like you have a vacuum leak, your manifold is trying to keep a vacuum and its getting extra air probably from one of your vacuum lines causing it to go in and out of open loop and reading lean. Just check all your lines, its most likely not the egr valve or the o2 sensor


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