what does this code mean

 

Catalytic inefficiency i believe. Someone can correct me if I'm wrong.

 

P(erfect.disguise) 420(08)
<---------

 

meaning bad o2 sensor??

 

Catalyst system efficiency below threshold.

This means that either the rear oxygen sensor is bad or the catalytic converter is bad and or clogged up.

 

its a brand new high flow converter

 

Consider disabling the code via hptuners for Emissions if you have to do that in your area. The code will never go away on its own. Some people get lucky with an "o2 spacer" or whatever its called.

 

There's your problem. Sometimes high flow cats aren't efficient enough for the pcm to consider "working".

 

Perfectly put.

 

but the converter has been on for 8 months now i can clear the code and the nit will come back like 4 days later

 

bump for anymore ideas

 

who is the converter made by.... most likely it is your cat! high flows dont last long before setting this code. this is what i did to solve mine if you dont have the money for a new tune go to autozone or wherever you like and buy a spark plug spark fowler that the sensor threads into. drill out the end so the o2 sensor threads all the way in and then put it in your down stream o2 and problem solved

 

Get the code disabled.. or get a spacer.. your convertor was barely effective enough to keep from throwing the code.. now that you've got some miles on it, it's not anymore..

el fin

 

how do i get the code disabled,,,and will it turn the light off

 

HPTuners can change the code to report no fault.. and thus no CEL