Rerouting Chevy injector connectors

April 15, 2024
This bulletin applies to 2011-2015 Chevy Cruz, 2016 Cruze Limited, 2012-2020 Sonic and 2013-2021 Trax vehicles, all equipped with a 1.4L engine.

This bulletin applies to 2011-2015 Chevy Cruz, 2016 Cruze Limited, 2012-2020 Sonic and 2013-2021 Trax vehicles, all equipped with a 1.4L engine.

Technicians may encounter a rough idle, surge, shudder, poor transmission shift feel or misfire, with or without DTC P0300 set in the ECM.

While performing the visual inspection portion of Strategy Based Diagnosis, utilize engine controls schematics to compare the Fuel Injector Control Circuit wire colors at the fuel injector and at the ECM connectors.

The connectors at the fuel injectors or individual circuits at the ECM connectors can be reversed, leading to misfires that may occur only under specific circumstances or RPM ranges, making them difficult to duplicate or diagnose.

If this concern is found, inspect the related harnesses and terminals for signs of damage due to potential misrouting.

About the Author

Motor Age Staff

Motor Age has been publishing technical content for professional automotive technicians since 1899. Our writers have decades of experience and scores of ASE certifications, and they continue to teach new generations of technicians via classrooms all around the globe, as well as through the books and training manuals they've authored. 

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