My O2 sensor is triggering the CEL and I don't know what will happen if I just drive the car with the sensor not working. It is a 300 SE 1990. Thanks for any help!

you can technically, the car will just revert to 'ideal circumstances' model for the ECU, youll get worse mileage and potentially damage your catalytic though.

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1992 850i 6 speed
1991 M3 S54B32 swap
2007 328iT/6 RWD sport wagon
1987 325E 330iZHP engine swap
2004 Vespa 200GT
1976 W115 240D getting a much bigger engine. 5.5L
1997 R129 SL600 5AT

Someone will correct me if I'm wrong.

But I think some of those early models had a light that came on at a certain mileage for the O2 sensor. It was no real reflection on the condition of the sensor.

As said above, the car will probably run fine but mileage will suffer.

maybe in late model cars thats true, but these cars really only throw that light when they cant sense mixture correctly anymore. Im betting its actually the 02.

good thing: they are really cheap for these cars.

__________________
1992 850i 6 speed
1991 M3 S54B32 swap
2007 328iT/6 RWD sport wagon
1987 325E 330iZHP engine swap
2004 Vespa 200GT
1976 W115 240D getting a much bigger engine. 5.5L
1997 R129 SL600 5AT

They are? Where are you getting them, because I can't find a genuine one for under $150, and the generic is at least $80

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-tp


1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS
1988 560SEL "Gunther"- 190K passes anything except a gas station
1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition

parts cars mostly, but there are cheap places somewhere. always are.

__________________
1992 850i 6 speed
1991 M3 S54B32 swap
2007 328iT/6 RWD sport wagon
1987 325E 330iZHP engine swap
2004 Vespa 200GT
1976 W115 240D getting a much bigger engine. 5.5L
1997 R129 SL600 5AT

Diving with O2 Sensor not working

How deep were you thinking of going ?