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Check engine light stay on all the time but dim. No Codes

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Old 11-03-2016, 02:30 AM
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Car: 1989 IROC Z L98 G92
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Check engine light stay on all the time but dim. No Codes

I was wondering if anyone else has had this problem. After changing all of my IP light bulbs to LED, my CEL light stays on all the time but real dim. I check for codes and none come up and light will flash like normal for the code 12 but instead of flashing on off it will flash bright to dim. Any help would be appreciated.
Old 11-07-2016, 04:49 PM
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LED Sled

That’s because it takes so little current to activate the LED.

You can cure the problem with a 56 ohm resistor across the lamp socket.


Happy Racing !



! Drive It Like You’re Renting It !
Old 11-07-2016, 10:06 PM
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Re: Check engine light stay on all the time but dim. No Codes

I experienced this as well. I just put the incandescent back in the CEL socket.
Old 11-08-2016, 06:21 AM
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Re: Check engine light stay on all the time but dim. No Codes

Had the same problem and with the air bag light also. I also put the regular bulbs back in.
Old 11-08-2016, 02:25 PM
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Re: Check engine light stay on all the time but dim. No Codes

Wow...the things I learn hanging around this place....




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