2012 pulley and tune

[JoeT]

I just pulled mine out after 6 months of it being in, my VMP pulley and tune was getting a check engine light with a P0420 code, thinking it had to go in for warranty work I reverted to stock cleared code. Put about 50 miles on it now stock and no engine light. Gonna keep it stock for a little while to be sure, its possible that the change in temp outside created a false light. Big difference in torque without the pulley and tune.

[billyboss]

I just pulled mine out after 6 months of it being in, my VMP pulley and tune was getting a check engine light with a P0420 code, thinking it had to go in for warranty work I reverted to stock cleared code. Put about 50 miles on it now stock and no engine light. Gonna keep it stock for a little while to be sure, its possible that the change in temp outside created a false light. Big difference in torque without the pulley and tune.

po 420 is a catalytic efficiancy code, read off of the secondary o2 sensor, should have nothing to do with a pulley and tune, unless the pulley and tune had a effect of ruining the cat