New Holland 3981 – ENGINE: Diesel Oxidation Catalyst IN Temperature under 220 °C during regeneration
Issue description
The Diesel Oxidation Catalyst (DOC) IN temperature is below 220 °C (428 °F) during the regeneration process. This indicates that the catalyst is not reaching the required temperature to function properly.
Check the cause
The temperature sensor associated with the Diesel Oxidation Catalyst (DOC) IN
The exhaust system for blockages or restrictions that may prevent proper heat buildup
The engine operating conditions during regeneration
Repair steps
Verify the functionality of the temperature sensor
Check the sensor for proper installation, wiring, and signal output.
Inspect the exhaust system
Look for any obstructions, leaks, or damage that could affect exhaust flow and heat retention.
Review engine performance during regeneration
Ensure the engine is operating at the correct load and speed to generate sufficient heat.
Parts you might need
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