Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe® Online for applicable fixes to the calibration stored in the ECM.
If this fault code is active and there has been damage to the aftertreatment system, the permit switch may have prevented the aftertreatment system from performing a mobile (active) regeneration. Consult with the OEM if the aftertreatment system has failed due to the permit switch.
Possible repairs:
1)If necessary, recalibrate the ECM.
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![The IDSS Isuzu 2020 Diagnostic System is a comprehensive tool for diagnosing and repairing Isuzu commercial vehicles made from 1996 onwards. It includes service information, a full scanner, service programming, and technical support. The system is compatible with US and Canadian-spec Isuzu vehicles and requires specific hardware and software specifications for operation.DOWNLOAD IDSS Isuzu G-IDSS 2020 Diagnostic Service System [08.2020] Release Full](https://i0.wp.com/dtctruck.com/wp-content/uploads/2023/07/1111.png?resize=300%2C300&ssl=1 "The IDSS Isuzu 2020 Diagnostic System is a comprehensive tool for diagnosing and repairing Isuzu commercial vehicles made from 1996 onwards. It includes service information, a full scanner, service programming, and technical support. The system is compatible with US and Canadian-spec Isuzu vehicles and requires specific hardware and software specifications for operation.DOWNLOAD IDSS Isuzu G-IDSS 2020 Diagnostic Service System [08.2020] Release Full")
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