Ryan Tenney Posted April 10, 2020 Share Posted April 10, 2020 hey new to the forum here! We've been having issues with a lot of our aftertreatment on most the equipment. We have a specific 2019 lr600 mp7 truck. That is having issues running a complete regen. Codes that come up are ----p249f00 excessive time to enter closed loop regen control P24a000 closed loop regeneration control at limit- temp too low Soot level in cluster stays at 129% 0% ash Recently updated the ecm and acm and was good for about a week now back stuck at 129% Park regen message displays but no changes after a burn Any thoughts? Quote Link to comment https://www.bigmacktrucks.com/topic/61979-2019-lr600-trash-unit-wont-regen/ Share on other sites More sharing options...
fjh Posted April 10, 2020 Share Posted April 10, 2020 Have you changed any parts do you have tech tool check the fuel pressure! 7th injector Can causes issues! Quote Link to comment https://www.bigmacktrucks.com/topic/61979-2019-lr600-trash-unit-wont-regen/#findComment-448263 Share on other sites More sharing options...
Mack Technician Posted April 10, 2020 Share Posted April 10, 2020 Clean out the sensor and it's ports on the EGR mixer tube. We've had DPF/Regen quirk-outs when those get plugged with soot. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/61979-2019-lr600-trash-unit-wont-regen/#findComment-448284 Share on other sites More sharing options...
j hancock Posted April 10, 2020 Share Posted April 10, 2020 Take it back to the dealer for some professional warranty work. Sorry, never mind.... 1 Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/61979-2019-lr600-trash-unit-wont-regen/#findComment-448305 Share on other sites More sharing options...
turckster Posted April 12, 2020 Share Posted April 12, 2020 While performing a regen do the temps look ok,? The AHI nozzel could be plugged and or dirty, could be a fuel psi issue to AHI module. Quote Link to comment https://www.bigmacktrucks.com/topic/61979-2019-lr600-trash-unit-wont-regen/#findComment-448538 Share on other sites More sharing options...
Ryan Tenney Posted April 14, 2020 Author Share Posted April 14, 2020 All Temps were okay changed the 7th injector and pav valve behind the filter housing took a regen finally. Its sister truck in our fleet asked for a parked regen went fine started truck back up later that evening and boom soot at 129% 0% ash this has got to be software related same numbers same issues multiple trucks with all less than 40k miles. We've had maybe 3 of these trucks do this at this point and our dealers out here are about the slowest turn around time and they always seem to come back with engine lights on. When thats what they were sent there in the first place for Quote Link to comment https://www.bigmacktrucks.com/topic/61979-2019-lr600-trash-unit-wont-regen/#findComment-448723 Share on other sites More sharing options...
Wasteman1 Posted July 1, 2021 Share Posted July 1, 2021 I have one currently doing this, ever find a solution? Quote Link to comment https://www.bigmacktrucks.com/topic/61979-2019-lr600-trash-unit-wont-regen/#findComment-476221 Share on other sites More sharing options...
Ed W Posted May 27, 2022 Share Posted May 27, 2022 I haven't burned any def in over a year. Any ideas? Truck just recently started getting sluggish. Quote Link to comment https://www.bigmacktrucks.com/topic/61979-2019-lr600-trash-unit-wont-regen/#findComment-498599 Share on other sites More sharing options...
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