Bring your vehicle to a dealer or any facility authorized by the manufacturer to perform warranty repairs to the vehicle or its emissions control system. Notify them that you wish to obtain a repair under the Performance Warranty. You should have with you a copy of your emissions test report as proof of your vehicle’s [...]

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The law doesn’t require you to fail the emissions test to trigger the warranty. If any test shows that you have an emissions problem, get it fixed while your vehicle is still within the warranty period. Otherwise, you could end up failing a future test because of the same problem- and paying for the repairs [...]

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Two types of repairs are covered by the Performance Warranty, depending on  the age of your vehicle: Any repair or adjustment which is necessary to make your vehicle pass an approved locally-required emission test is covered if your vehicle is less than two years old and has less than 24,000 miles. Any repair or adjustment [...]

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Not every shop has this particular test device (although almost all radiator shops do), but if the balance test and compression test indicated a problem, this test might be called for. A device samples coolant from the radiator with the engine running at high idle, and a test liquid changes color if there are combustion [...]

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If the cylinder balance test indicated there might be an internal mechanical problem, the spark plugs are removed and a pressure gauge is inserted into each spark plug hole, one cylinder at at time. When the engine is cranked for a few seconds, the gauge registers the compression developed, and can precisely indicate weak cylinders [...]

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