90 300se Cel

10-03-2006, 05:52 PM

kachun

Registered User

Join Date: Mar 2005

Location: Fremont, CA

Posts: 3

Thanks for the info. I take that you meant the O2 sensor was the one event that you thought could light up the CEL without throwing a code.

I did checked the 02 sensor with a scope on the X11 connector. The on/off ratio was in range at both idle and high RPMs, so the chance was high with intermit cable/connectors. I will recheck all the connections. Well, it is way passed 60K miles with my current O2 sensor, maybe, I go ahead and replace it.

Thanks again

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Kachun

1990 300SE
2003 E320

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