Now available for EPA17 (2018–2022)
We’ve made an exciting update to OTR Diagnostics for Paccar MX engines!
If you're working with EPA17 (2018–2022) models, you now have a powerful new command at your fingertips: Evaluate the SCR System.
This new addition expands your ability to manage and maintain your truck’s aftertreatment system more effectively, especially critical when dealing with stubborn SCR or DEF-related issues.
Here's a quick breakdown of the available commands by emission standard and model year:
Paccar MX-11 and MX-13 Engine Support
2011–2017 | EPA10 / EPA13:
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Reset fault codes
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Reset aftertreatment
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Reset EGR derate
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Reset 5mph DEF derate
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Install a cleaned DPF
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Install a new DPF
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Purge SCR/DEF module
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Forced DPF regen
2018–2022 | EPA17:
(Now includes the new Evaluate the SCR System command!)
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Reset fault codes
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Reset aftertreatment
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Reset EGR derate
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Reset 5mph DEF derate
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Install a cleaned DPF
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Install a new DPF
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Purge SCR/DEF module
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Forced DPF regen
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Evaluate the SCR System
2022–2024 | EPA21:
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Reset fault codes
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Reset aftertreatment
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Reset 5mph DEF derate
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Forced DPF regen
Why the new "Evaluate the SCR System" command matters
The SCR (Selective Catalytic Reduction) system is one of the most critical parts of a truck’s emissions control. If it's underperforming or malfunctioning, it can trigger engine derates, limit truck performance, and result in expensive downtime.
With the new Evaluate the SCR System command, you can:
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Quickly assess the health and performance of the SCR system.
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Pinpoint problems before they escalate into costly repairs.
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Reset potential warnings tied to DEF dosing or SCR efficiency.
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Get back on the road faster with greater confidence.
This tool is especially valuable for owner-operators and fleet managers aiming to stay ahead of aftertreatment issues and avoid the dreaded 5mph derates.
Keeping you in control
At OTR Performance, we’re committed to giving you the tools you need to take control of your truck’s diagnostics and maintenance. With this update, your Paccar MX-11 and MX-13 coverage just got even stronger.
Stay tuned for more updates and as always, if you have any questions or need help accessing the new command, our team is here for you.
