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GM TechLink: 2006 - 2013 Cadillac CTS-V: DTC P0300 Setting after Engine Repairs

Rob

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Source: GM TechLink
Date: January 14, 2014

DTC P0300 (Engine Misfire Detected) may set after performing engine repairs on the following vehicles equipped with a V8 engine:
• 2004-2007 Rainier
• 2008-2009 LaCrosse, Allure (Canada Only)
• 2006-2013 CTS-V
• 2002-2013 Escalade
• 2010-2013 Camaro
• 2011-2013 Caprice PPV
• 2002-2013 Avalanche
• 1999-2013 Express, Silverado, Suburban, Tahoe, Savana, Sierra, Yukon
• 2002-2014 Silverado HD, Sierra HD
• 2009-2013 Colorado, Canyon
• 2003-2009 Trailblazer, Envoy
• 2006-2009 Impala SS
• 2006-2007 Monte Carlo SS
• 2003-2006 SSR
• 2005-2013 Corvette
• 2003-2010 Hummer H2
• 2008-2010 Hummer H3
• 2008-2010 G8
• 2005-2006 GTO
• 2005-2008 Grand Prix GXP
• 2005-2009 Saab 97X

It is possible to have the fuel injector electrical connectors crossed for cylinders 5-7 and 6-8, which may cause an engine misfire. The engine misfire may not be detected and may happen during deceleration.

If crossed injector connectors may be a possible cause, follow the appropriate Service Information to validate the injector connector routing. (Fig. 17) If necessary, correct the injector connector routing and evaluate for proper operation.


- Thanks to Richard Renshaw
 

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