Unfortunately not. I actually have come across your threads related to it when trying to find any information on the brake switch on newer models. Although I do share the same P0420 code you mentioned, but that came on at like year 6 of the problem and I no longer need to get emissions tested anyways so I ignore it. Did you ever get to changing the switch? I saw another poster saying it fixed a somewhat similar surging problem but I've never had any brake light or cruise control issues as far as I know. The only reason I'm pursuing it is because the older switches have been said to get wonky and make it seem like the TCC/Torque converter itself is at fault - not to mention potentially an easier fix. That, and when hitting the brake while going about 50mph doesn't do anything to the RPMs.Originally Posted by industrialfish
I also just got back from the dealer for a PCM update for bulletin #04-06-04-078: Hesitation, Roughness, Light Chuggle or Check Engine Light - which was a grand waste of 70 dollars
