Faulty wiring for head light triggers check engine? - Toyota Prius Forum : Prius Online Toyota Forums
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post #1 of 2 (permalink) Old 01-10-2015, 09:28 PM Thread Starter
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Default Faulty wiring for head light triggers check engine?

Hello there. I was wondering if this seems reasonable. I just bought a used 2008 Prius top trim package with 107,00 miles on it this last month. The first day I owned it a check engine light was triggered. The guy I bought it from hooked it up to his computer and cleared it to then try to trigger it again. This happened when I first turned on the car. I started backing and then it turned on. I didn't know what caused it as we couldn't trigger the response again. It's been a few weeks now and 1 trip to the shop for some repairs. There have been no problems what-so-ever since then and my Prius just started getting close to the 50 MPH as advertised after a tune up.

Today when I'm driving, as the seller did mention before could happen, the right headlight turned off. As he had told me before, just turning the lights off and turning them back on will get it working again. I did this and as soon as I did the check engine light came on. I go back to the night I originally had it happen and I was probably in the process of turning on my lights.

Has anybody heard of this happening before? Easy solution to fix? Could the forced LED headlights? Any information would be great. I would also like to thank all of the forum members out there as you all have helped me with information the lead me to want to join the Prius family. Hope to hear back from you all.

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post #2 of 2 (permalink) Old 01-18-2015, 09:26 PM
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In the 2004-2009 models the top trim line used HID headlight (you can check by looking at the front of your car for fog lights. If you have fog lights then you should have HID headlights. There has been a lot of discussion in the archives about HID problems including turning off on their own or not turning on. Look for those references to HID problems.

HID stands for High Intensity Discharge headlamps.
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