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How to Remove the "Code 84" Message from a Chevrolet Cruze

Model: Chevrolet Cruze J300, MK 1 - Years: 2009, 2010, 2011, 2012, 2013, 2014, 2015
Part: Warning light – error code

See other generations:
Video tutorial

The "Code 84" message displayed on the Chevrolet Cruze indicates that engine power has been reduced. The reasons could vary from complex issues like injector replacement to needing a full service of the vehicle.

Therefore, it is important to visit a workshop for a diagnosis. To reset the light, you need to disconnect the battery cable and the connector located on the car's floor, as shown in the video.

Also, disconnect the throttle body in the engine compartment and repair the loose connection that it creates. To do this, simply reposition the throttle body connector correctly.


Updated on 28 August 2026 by ScegliAuto


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To reset the tyre pressure warning light on the Kia Niro EV, inflate the tyres until they reach the correct pressure value. This value is indicated on the sticker attached to the driver's door pillar. Once the tyres are inflated, turn on the instrument cluster to check that the warning light has completely disappeared from the display. If it is still present, you may need to drive for a few miles to ensure it disappears completely from the screen.

Watch the video!


by ScegliAuto

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