2009 freightliner Columbia DD15 14 liter Detroit will not regenerate

Inspections List

Inspect for engine fault codes Inspect engine air filter Inspect engine hoses & manifold for air leaks Inspect fuel filter Inspect egr valve temperature sensor Inspect egr pressure sensor Inspect turbo actuator Inspect EGR valve

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2009 freightliner Columbia DD15 14 liter Detroit will not regenerate

Will not regenerate and the temp light comes on and off during regeneration