clearing the CEL from header...
Just the back. Front one would probably melt. And you want the front O2 sensor reading dirty air.
The idea is for the two to read different air levels. First should be dirty air, second should read clean air. Then the ECU thinks the catalytic converter is working.
The idea is for the two to read different air levels. First should be dirty air, second should read clean air. Then the ECU thinks the catalytic converter is working.
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Silverfox742
04-06 Lancer Ralliart How To Requests / Questions / Tips
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Jan 12, 2008 10:28 AM




