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hssssssss · 10-18-2001, 09:36 PM

Last weekend I installed an off-road H pipe. Of course now I have a check engine light on and I would like to trick the PCM into thinking I still have a cat (in case I get a "real" check engine light). Does anyone know how the "dummy" O2 sensors work. Are they passive or active? I think all I need to do is put in a 2-3 second delay into the secondary O2 sensor but I don't know how to package the delay as it gets very hot and sometimes wet underneath the car. Any suggestions besides wimping out and buying a "dummy" O2 sensor?

10-18-2001, 09:36 PM	#1
hssssssss Registered Member Join Date: Jun 2001 Location: Dublin, OH. Posts: 2	Information on Check Engine light Last weekend I installed an off-road H pipe. Of course now I have a check engine light on and I would like to trick the PCM into thinking I still have a cat (in case I get a "real" check engine light). Does anyone know how the "dummy" O2 sensors work. Are they passive or active? I think all I need to do is put in a 2-3 second delay into the secondary O2 sensor but I don't know how to package the delay as it gets very hot and sometimes wet underneath the car. Any suggestions besides wimping out and buying a "dummy" O2 sensor?