Quote:
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Originally Posted by r33
Quote:
Originally Posted by BluF22
Anyone get a P0420 Fault code with a catless downpipe?
I do have a Stage2 JB4 and thought it auto clears that.
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Is this the first time it shows up since you install the JB4?
How did you get that code, from the JB4 via USB and JB4 desktop software or OBDII diagnostic tool? |
This is the first time seeing this code after the dp pipe install.
I got an engine light and saw the code on the P3 vent gauge, apparently, it cannot clear that code.