P2463 CHEVROLET - Diesel Particulate Filter Restriction Soot Accumulation
Tech notesA 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.
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.
There is a factory service bulletin for the following Chevrolet Models:
2007-2008 Chevrolet Express
Chevrolet Express Factory Service Bulletin OBDII Code P2463
P2463 Chevrolet DescriptionThe Diesel Particulate Filter (DPF) is monitored for conditions where it may be overloaded. The monitor compares the calculated restriction of the DPF to two thresholds. By exceeding the first threshold for a sufficient period of time, a wrench light will be illuminated. By exceeding the second threshold for a sufficient period of time, a wrench light and a MIL will be illuminated and engine output will be limited and EGR is disabled.
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