Check Engine Light - P0420

[minuteman048]

On the way home from a great meet the other night I got a CEL....SOB!! Kind of knew what it was so was not too alarmed. Since I have the high flow cat mid-pipe you can get a P0420 code which is the rear oxygen sensor. Since the flow through the cat is much higher, sometimes the sensor does not pick up anything. So that's when you need one of these:

http://www.bigdaddiesgarage.com/

http://www.bigdaddiesgarage.com/straight-cel-fix.html

The current one is the second one I have gone through and they last a few years so it's time to replace it. Got one on order.

[minuteman048]

testing

[Jaysz28]

nice way to defeat the ecm when gutting the cat.....

[Agent☣Orange]

Too bad the rear O2 can’t be disabled in a tune.