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January 13, 2012 Service bulletin

Kenworth: erroneous fault codes may develop in chassis or check engine warning light related to nox...

Kenworth technical service bulletin SB-E-049 for 2009-2011 Kenworth T300 and 2009-2011 Kenworth T470.

Bulletin number
SB-E-049
Component
Engine and engine cooling: engine
Summary
Kenworth: erroneous fault codes may develop in chassis or check engine warning light related to nox emissions measurement and aftertreatment if improvement for the recalibration of engine control module (ECM) is left uncorrected.

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