I have a 99 GLE, and my check engine light came on recently, so I thought I would pull the codes from the ECU myself. Problem: There is no screw on the ECU, just a hole with no screw. The sticker on the ECU was fully intact, and had not been punctured. Any ideas?

 

It is a tiny philips. If you use a mirror behind gas pedal and shine a flashlight in the hole you'll see it.

Be carefull when turning the screw as when I did it, I couldn't feel any stops as the text seems to indicate you should.

I just turned a quarter turn clockwise, wait 2s, turn quarter turn counterclockwise.

Good luck!

 

yeah be VERY carefull. I wasn't and broke mine off.

 

i think i broke mine too - what is the impact of that?

 

lol me too!

 

you guys should go by sound and not feel. you can hear it make that weird buzz noise, then wait two seconds, turn back again to hear it and you should be set. that stinks it's so sensative.

 

You should go to autozone and let them pull the codes, and then convert the codes using hte sticky -"Help my check engine light is on"

 

make sure its the right hole. take computer out and apart and fix it. maybe the switch is floating around inside the comp. if yours broke do the same thing. there is a piece of plastic in switch that you could probably super glue. i did. now i'm careful not to turn screw hard.