Good Morning - Last week my 2021 Cascadia had new DEF pump installed in Albuquerque NM. The codes at the that time I had were SPN 5435 FMI 31. Repair shop guys said it needed a new DEF PUMP and we got it replaced.
New DEF Pump was installed on Monday, Truck drove from Albuquerque to Bakersfield CA. Load was delivered in Bakersfield on Tuesday Morning. Truck was not driven/started after delivering the load till Friday evening. After driving for less than 5 miles, Truck has CHECK ENGINE light on, DEF is also leaking and I checked in Samsara it is not showing 3 codes with SPN 4374 FMI 0.
Please suggest what is going on.
DEF Pump Issue
Discussion in 'Freightliner Forum' started by sonnyca, Apr 20, 2024.
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Another Canadian driver Thanks this. -
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If that is a DEF leak then there's your problem. Pump speed is high because all your DEF is getting sprayed onto the ground instead of going where it needs to.
sonnyca and QUALITYTRUCK Thank this. -
Can you see where the def is leaking from? Crawl under if you haven't already and see if there is a busted line or maybe it came undone.
sonnyca and QUALITYTRUCK Thank this. -
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Any suggestions, Do I need to connect it to computer to remove the code? -
Some dpf related codes need a reset with a tool. Some may go off after a couple days driving. No idea what it will be for your particular problem. I'd probably drive it a few days and see if it goes off by itself than go in and get hit for more money but that's just me.
sonnyca Thanks this. -
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Seeing for source address (SA) 23 which is the instrument cluster, that for the ICUCO1T the fault SPN 523002/FMI 31 is listed. Fault description is an EEPROM checksum fault condition exists.
Fault trouble shooting shows to program the Instrument Cluster Unit (ICU) with the "Newest" software available on server, if available. Otherwise, program the ICU to the "Latest" settings. or the "Factory" settings. If the programing was successful and fault is inactive no further action. If fault is still active after programming it says to replace ICU.sonnyca and RocketyMan Thank this. -
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