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NW Iowa | 521002 - upper side control valve
- excessive temp
- short to 12V
- short to ground
- open circuit
Not sure if they are referring to the something in the pump module, or the dosing module. Call ziegler tech support or have your dealer ask agco.
Some of the codes its hard to tell what they are really referring to.
When it comes to DEF on these, I first check the battery and the module wire harness with the white wires coming off it. Then i open up the DEF cover and check those plugs. I always keep that area clean and dry. I change out the DEF filter every yr with the other filters when i service.
Edit- I'm guessing you have something wrong with your DEF pump.
Edited by Massey1155 6/27/2023 08:52
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Challenger MT675D Error Code
