Zeuz Posted January 29, 2023 Share Posted January 29, 2023 I have a 2006 CHN 613 it won't go over 63 mph at 1600 rpm that's all it will do it has a 18 spped.... I took it to a mechanic he said it's reading Egr- mass flow-open ( flash code 5-9). Before he goes guessing and replacing parts ..i was wondering is anyone has had this code or knows anything about it... Quote Link to comment https://www.bigmacktrucks.com/topic/72442-chn-613-egr-mass-flow-open-code-5-9/ Share on other sites More sharing options...
Joey Mack Posted January 29, 2023 Share Posted January 29, 2023 Well here I go again.. replace the little filter for the VGT actuator, then re-test Quote Link to comment https://www.bigmacktrucks.com/topic/72442-chn-613-egr-mass-flow-open-code-5-9/#findComment-524076 Share on other sites More sharing options...
Zeuz Posted January 29, 2023 Author Share Posted January 29, 2023 Ok im going to try that first...the mechanic wants me to replace the tube with the EGR control .but i wanted to see if it could be something else...thank you Quote Link to comment https://www.bigmacktrucks.com/topic/72442-chn-613-egr-mass-flow-open-code-5-9/#findComment-524077 Share on other sites More sharing options...
Joey Mack Posted January 29, 2023 Share Posted January 29, 2023 A lot of guys dont replace it and it will affect the turbo performance.. Yes there can be several issues to cause this. The pipe you speak of is around $1200.00, There is a check valve at the intake manifold end of that pipe that can get sooted up and act foolish.. You can un screw it and clean and inspect it. and put it back in if it is not damaged.. I'm trying to keep you from spending thousands on hard parts that dont fail very often.. You can also lube the VGT actuator at the lever on the turbo. We used to take the pin out and buff the pin lube it before putting it back in.. Another thing I have repaired, was a bad or incorrect boost sensor.. I hope the mechanic is not a new age laptop crazy guy, and rather an actual Mechanic.. Can he test drive the truck?? jojo Quote Link to comment https://www.bigmacktrucks.com/topic/72442-chn-613-egr-mass-flow-open-code-5-9/#findComment-524078 Share on other sites More sharing options...
Zeuz Posted January 29, 2023 Author Share Posted January 29, 2023 No ,he hardly ever test drives just the computer.....i priced that tube at mack it was 1900.00..i have no issues getting it but i wanted to double check first...thanks for the info..i just got the truck a few weeks ago for my lowboy..the gauges will work the quit it cuts on and off...does that have anything to do with it u think? Wiring or so Quote Link to comment https://www.bigmacktrucks.com/topic/72442-chn-613-egr-mass-flow-open-code-5-9/#findComment-524079 Share on other sites More sharing options...
Joey Mack Posted January 29, 2023 Share Posted January 29, 2023 Oh Hell... Check all the grounds!! I have posted this procedure many times.. Look up a 9-2 code and follow the flow chart.. It takes an hour or 2 but it needs to be done... and you dont need to be a master mechanic. just on a 'mission'.. simple tools to do this, as well.. jojo Quote Link to comment https://www.bigmacktrucks.com/topic/72442-chn-613-egr-mass-flow-open-code-5-9/#findComment-524080 Share on other sites More sharing options...
Joey Mack Posted January 29, 2023 Share Posted January 29, 2023 One common repair I have made it to clean the main eyelets on the bolt that is on the engine block in front of the starter.. You need a 15/16" wrench. remove it, (if it's not tight It is a problem) clean the block, bolt, eyelets, and if there are star washers, throw them in the trash.. scrape off any heat shrink glue that has oozed out onto the eyelets.. then put it back together nice and tight.. The 2 thin eyelets are for the engine wire harness, if they dont ground good, you WILL have issues like yours.. jojo 1 Quote Link to comment https://www.bigmacktrucks.com/topic/72442-chn-613-egr-mass-flow-open-code-5-9/#findComment-524083 Share on other sites More sharing options...
Pollo432 Posted July 12, 2023 Share Posted July 12, 2023 Any updates on this? I am having the dreaded 5-9. I have a new MAF sensor I can install and if it doesn’t fix the problem, reinstall the old one. Quote Link to comment https://www.bigmacktrucks.com/topic/72442-chn-613-egr-mass-flow-open-code-5-9/#findComment-534695 Share on other sites More sharing options...
Mackpro Posted July 13, 2023 Share Posted July 13, 2023 The most common reason the mass flow/temperature sensor assembly fails is failed EGR cooler (cracked leaking coolant internally) or even condensation in the cooler. The sensor assembly can not tolerate any water/liquid and will fail as soon as coolant passes through it. They are very delicate, that’s why they are welded into the tube. The main reason the EGR fails is the screen in the lower radiator “Y” pipe clogs and stop flow of coolant to the EGR cooler and it overheats and cracks . Quote Link to comment https://www.bigmacktrucks.com/topic/72442-chn-613-egr-mass-flow-open-code-5-9/#findComment-534729 Share on other sites More sharing options...
Mackpro Posted July 13, 2023 Share Posted July 13, 2023 http://www.engineprofessional.com/TB/TB011816-1.pdf Info on the screen. Quote Link to comment https://www.bigmacktrucks.com/topic/72442-chn-613-egr-mass-flow-open-code-5-9/#findComment-534730 Share on other sites More sharing options...
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