Had a 2009 Cummins ISC in this week, check engine light, regen needed but customer could not activate, customer tried to override with insite.
Bus drove in OK, DPF is face plugged. Working on determining the cause. Known issues with this unit: Bio-Diesel, School Bus application, about 20,000 miles and a year and a half of operation.
Will update once we find the cause.
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