Hornet_2497 answered 6 years ago
Nothing serious. There is a heater core built into your O2 sensor to make it heat up and read faster than by exhaust heat only. When this fails, you get codes P1166/P1167. There's a YouTube video how to repair it. It won't hurt to drive it like that. It will not stall either.
How to fix p1166 p1167 on 99 Honda Accord
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