Check engine light only turns on when driving 50 to 70 mph

1992 HONDA ACCORD

125,000 MILES • 4 CYL • 2WD • AUTOMATIC

BRANDON2654

MEMBER
1 POST

My car about 179,000 miles on it. When I'm at speeds of 50 to 70 mph the check engine light comes on. When I turn off the car to check the code with the wire. The light doesn't come back on until I hit that speed again. The car drives well at those speeds. I'm tired of looking at the yellow light and not knowing how to fix it . Does anyone know what's wrong with my car?

Apr 23, 2019 at 2:50 PM

SCGRANTURISMO

✓Experienced Mechanic
4,897 POSTS

Hello,

These type of Direct Trouble Codes (DTC)(s) can be hard to pin down. In the diagrams down below I have included for you a Honda factory diagnostic troubleshooting guide for pinpointing the problem that is causing your Malfunction Indicator Lamp (MIL), or "check engine" light to illuminate. Because it is turning on at freeway speeds, I would guess that it is emission related, but that might not be 100% accurate. The guide is a little lengthy, so please have patience and do not skip anything. It will require you to use a multi-meter, so if you are unfamiliar with how to use one I have included a link for you to go to below:

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Please go through these guides and get back to us with what you are able to find out, please.

Thanks,
Alex
2CarPros

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