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Oxygen Sensor Bypass/ Simulator

407 Views 6 Replies 4 Participants Last post by  Incognito
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So recently went back to catless after passing emissions and didn't want that little engine symbol popping up again with the typical P0036 and P0139 codes. After scouring the interwebs I located a hack where you place a resistor and a capacitor in the O2 sensor wires. This got rid of the P0036 and P0139 codes even without a O2 extension but now I have a P2270 code (O2 sensor stuck lean), so FML. I'm wondering if a lower ohm resistor would get rid of the code. Just thought I'd share and maybe see if someone else has done this.

Parts:
One 1 MEG ohm 1/2 watt 1% metal film resistor
One Capacitor 1 uf/microfarad 50 v/volt 85C Kemet Radial



... and here's my hack job. Everything was shrink wrapped afterwards and heat shielded.
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this worked great for my 2000 mitsubishi mirage going catless... not so sure about todays modern veloster turbo.

why wouldnt you use the tried and true o2 spacer?
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