didn't get a 33 or 53.....and when I cranked her for the first time after all the work she ran good but smoked for about 10 minutes just because it was burning off all the spilt/leaked radiator fluid and PB Blaster that got everywhere...the CEL didn't come on...I just ran the codes for kicks today after the 2nd run and that's what it returned.....I just double checked the O2 sensor connections and they're good (never unplugged the p/s one and even re-pined the d/s harness one)