14 CTS 4 Coupe check engine light
I recently changed the oil and filter in my 14 CTS 4 Coupe using Valvoline full syn dexos approved and a Mobil 1 cartridge filter. I also replaced the air filter, after driving the car a day later the check engine light comes on and has not gone off for four days now? Any ideas? The car is running flawless. |
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