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20/12/2022 10:55 pm
Topic starter
Hello,
I have a 2014 civic with 136 000 miles on it. My gas mileage has been slowly getting worse over the last year and every once and a while, the check engine light comes on and says "Check Emission System" on the heads-up screen, but it turns back off the next time I start the car and doesn't come back on for another few months. Where should I look first?
Thanks!
1 Answer
2
20/12/2022 11:05 pm
Scan for codes.
