Hi,
The check engine light on my 93 190 e 2.3 is on. I decided to check the code on the little unit in the battery compartment. So with the key on (engine off) I pressed that little button for 4 secs & released it and waited...the red light does not blink at all. I tried for longer periods but no luck. The red light just does not come on. Any ideas ???? Please advise. Thanks

smk_texas
98 s420 - 53k
93 190e 2.3 149k

Hold it down for 2 secs... it should lite when held down, and then flash back when released..

Hello Arthur,

I tried it once again before this response. It does not light up when held down nor does it flash after I release the button. This is a California car and I also noticed that it has a custom alarm put in and the alarm red light is always on. I am wondering if there is short somewhere that is caused by this alarm. Thanks for the help.

smk_texas
98 s420
93 190e

Try holding the button with the reader tip of a pencil..
If it still does not light, you could have a blown fuse for circuit 15.

Thanks Arthur. I'll try that and post my findings.

I pressed the button down with a sharp pencil still no red light. All the fuses look fine. Circuit 15 says parking/tail light. It has a white fuse and it looks fine. Pls advise. Thanks

smk_texas

Also, I noticed that the o2 (yellow idiot light) light does not light up when I turn on the ignition (engine off). The other lights on the dash come on and go off after the engine is on but the check engine stays on. The o2 stays off all the time. Any ideas ???
Thanks