Duramax DPF Soot
Level DTC P2463
A Clean Exhaust Filter Message or a Reduced Power Message on the Driver Information Center or an illuminated Service Engine Soon light on some 2010-2011 Express and Savana models and some 2011 Silverado and Sierra models equipped with the 6.6L Duramax diesel engine (RPOs LGH, LML) may be due
to high soot mass accumulation. An intermittent DTC P2463 may be set.
In addition, the Diesel Particulate Filter (DPF) service regeneration function may not initiate when commanded on with the Tech 2. Vehicles that have a high percentage of driving on short trips or in city traffic may be more susceptible to high soot mass accumulation. Complete the current Service
Information diagnosis for any DTCs or symptoms found. If P2463 is the only DTC setting, there is a new calibration that has been released to address the
high soot mass accumulation condition. After installing the latest Engine
Control Module calibration found in TIS2Web, complete a DPF service regeneration. The new calibration will address DTC P2463 when associated
with short trips and city driving. It also will repair the Tech 2 service regeneration operation. Any other driveability symptoms or DTCs must be diagnosed and repaired.
Info on Duramax Diesel Exhaust System Fluid Injector too in the article http://www.sandyblogs.com/techlink/O...chlink%20F.pdf