codes p0475 and p1211
#11
when you cleaned that little tube, did you clean the sensor too? the sensor could be dirty as well throwing the code. or the sensor could be going out. i think that sensor is relatively cheap, somewhere around $30.00. but it's good to hear that it helped. i know when you're towing even 1 mpg better is awesome. as far as the code soming back, try cleaning or replacing the sensor. to clean it, use a small pic and some brakeclean.
#13