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ATS 2L Turbo goes to a colder plug

Bruce Nunnally

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Cadillac sent a letter which asks that we bring the 2013 ATS in as soon as we can and get new sparkplugs and a new calibration. Interesting.

Dear Bruce,

We have learned that your 2013 model year Cadillac ATS may have a condition in which piston damage could occur due to an engine pre-ignition condition. If this condition occurs, the vehicle may perform poorly and oil consumption could increase. A warning light may illuminate indicating an engine misfire. If this repair is not completed before multiple pre-ignition events occur, the piston may be damaged and the engine may need to be rebuilt or replaced.

Your satisfaction with your ATS is very important to us, so we are announcing a program to prevent this condition, or, if it has occurred, to fix it.

What we will do: Your Cadillac dealer will reprogram the engine control module (ECM) with a revised spark control calibration and install spark plugs with a colder heat range (required with the new calibration). This service will be performed for you at no charge until December 31, 2016. After that, any applicable warranty will apply.

What you should do: To limit any possible inconvenience, we recommend that you contact your Cadillac dealer as soon as possible to schedule an appointment for this repair. By scheduling an appointment, your dealer can ensure that the necessary parts will be available on your schedule appointment date.

Also, enclosed is an Owner Manual supplement updating the spark plug part number information located in the "Maintenance Replacement Parts" found in Section 11. Please place this supplement in your Owner Manual for future reference.

If you have any questions or concerns that your dealer is unable to resolve, please contact the Cadillac Customer Assistance Center at 1.800.458.8006

The new spark plug is p/n 12647827


2016 Cadillac ATS-V gray/black

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I would do it post-haste; others have reported piston/engine failures elsewhere (on the web). It is unfortunate that this is occurring but hopefully Cadillac can nip this in the bud.


'19 CT6, '04 Bravada........but still lusting for that '69 Z-28

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  • 2 weeks later...

Got 5 updates on the Wife's ATS done today, including the plugs & recal. Had a 15 ATS sedan loaner, something below Premium since it had nav but not paddle shifters or HUD

The ATS was in and out of Crest the same day -- quick and easy.


2016 Cadillac ATS-V gray/black

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