ray1979

Hi guys I just got a 2015 z51 corvette with 1900 miles at night I noticed the check engine light is dim. It's not on but you can see it at night is this normal?

joemosfet

Got a pic?

The CEL shouldn't be on at all unless the engine has thrown a code, and, as far as I know, it only has one shade or brightness.

RonC7

Warning indicators are either on or off. If you have your dash lights at full brightness there may be enough reflected light to make some indicators appear to be dimly illuminated. Try turning down the brightness and see if it makes a difference.

Bill Dearborn

Is there something else that isn't working properly? Do you have any aftermarket electrical items attached to the car? If so remove it and see what happens. Check your fuses (under the hood and in the rear) to see if any of them are blown. Sometimes when a fuse blows or you have an improperly attached electrical item in the car you can get a sneak circuit path through another circuit.

Bill

ray1979

everything works as it should and there are no codes. Here is a pic. When i start the car the light is very bright then goes to thisNone of the other lights are dim

NSC5

I have a feeling a light shield on part of the gauge cluster is missing so that you are getting light through the CEL area from the overall gauge illumination. Probably dealer time and a quick test for my theory is to turn the IP lighting down and see if the CEL dims with it.

ray1979

I just checked no difference with dimming the lights
Here is the light onTime for a trip to the service department

NSC5

Well definitely dealer time then. Appears to have stray voltage to that annunciator lamp.

Snowwolfe

Just for the heck of it ask your dealer to run the VIN checking for electrical repairs.

ray1979

Will do

Bill Dearborn

If you don't have a scanner that can read all of the codes including ABS, SRS, and body codes you may not realize there is a code.

Another thing that can cause the light turn on dim is a grounding issue where another circuit has a poor ground and is finding a path to ground through the CEL. If you have ever debugged trailer lights with a bad ground you may have noticed things like turning on a left turn signal causes the trailer tailights to flash even though the two sets of lights are on separate circuits and the tow vehicle's are off.

Bill

ray1979

Dealer contacted gm and was instructed to test the ecm test showed ecm was bad replaced and everything is working fine.

5821driver

Good post with a good result. Thanks all....