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The check engine light has been coming on in our 2013 Infinity QX56. Our mechanic was able to clear the light for awhile by running fuel injector cleaner in the gas which lasted for four months. The light was back so we replaced the O2 sensors and added some injector cleaner to the gas. The light is back on and we are hoping the injector cleaner helps but our mechanic said the code reads a bad left side cat. Does anyone know if the cheaper aftermarket converters are any good? It looks like a factory converter runs around $1K compared to $300-$400 for an aftermarket manifold with cat. Should we replace both converters at the same time?
Thanks in advance!
Thanks in advance!