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International Automotive Technicians Network
Re: Cummins emission problem
Posted to HD/Fleet Forum on 7/1/2018

Ryan is correct.

You will need Insite and access to QSOL to get anywhere with this problem. This will end up coming down to a NOX issue or possibly even an updated SCR to remove the ammonia sensor and change the software. You need to troubleshoot 3543 first.... Login to read more.