2002 Nissan Xterra - CEL

My Nissan Xterra 2002 had rough start and check engine lights flashed. Husband changed plugs and wires and it still does it. What should he try next?

What codes did you get? The actual code numbers please.

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Make sure you don’t drive if the light is still flashing. You can cause expensive damage that way, especially to your catalytic converter.

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