South Korean carmaker Hyundai has found a new problem that can cause its car engines to fail or catch fire, issuing yet another recall to fix problems that have affected more than 6 million vehicles since 2015.

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According to the reports, the car maker is recalling about 20,000 Veloster cars in the U.S. and Canada because fuel can prematurely ignite in the cylinders around the pistons. U.S. government documents show the problem can cause excess pressure and damage the engine.

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This problem can led vehicles to stall and in some cases catch fire. Only 2013 Velosters are covered.

The problem is not same as what has caused the rest of the recalls since 2015 from Hyundai and its affiliated automaker Kia, which have been plagued by engine failures and fires across the United states.