Isuzu N Series 2008 Owner's Manual page 289

NOTE
• The time needed to complete regeneration differs depending on the outside
temperature.
• The exhaust brake or exhaust throttle is activated during DPD regeneration.
The exhaust brake or exhaust throttle starting to operate or being disengaged
will produce a sound, but this does not indicate a failure.
• During regeneration, white smoke may be temporarily produced from the
exhaust pipe. This results from combustion of PM, it does not indicate a failure.
• Regeneration is finished earlier immediately after driving than when the engine
is cold.
• The engine coolant temperature may rise during regeneration.
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