Help CEL
05-07-2008, 08:22 PM
#1
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Help CEL
well my CEL came on after i installed my xtc down pipe w/ high flow cat. the code was P0420 Catalyst System Efficiency Below Threshold (Bank 1). what does that mean. thanks guys
05-10-2008, 06:15 PM
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most likely problem with rear o2 sensor..mite have to disable it with hptuners or get one of thoe cel eliminators..i get it too and cant pass NY inspection due to it settin off 3 monitors.
05-10-2008, 06:52 PM
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get a cel elimintor...basically all it does is allow the o2 sensor to take a smaller sample of exhaust....
something like this
http://www.inlinefour.com/blcelelad.html
unplug your battery, install it, start it up...keep doing it till you get the thread set to the right height....
something like this
http://www.inlinefour.com/blcelelad.html
unplug your battery, install it, start it up...keep doing it till you get the thread set to the right height....
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