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I recently changed my spark plugs and wires. I got a check engine light and on my carmd I got a indication spark plug 6 had a problem. Problem was the wire came off while driving short distance. I put the plug wire on and disconnected my negative battery terminal to get rid of check engine light. My carmd still gives me a yellow light and suggests proceed with caution. How long would I have to drive my car to reset computer codes and get a green light? Walt

Answers from the Automotive Experts

Donna Burmeister, Service Manager at Classic Nissan You may have to have it cleared by a computer at the dealer or certified technician. Some hard codes don't reset.

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