[rvoll]

My '18 BRZ with only 7200 miles failed the smog test. The check engine light came on and then off again during the period prior to the test. When the test was done, there was no light. Codes stored were P0700, U0073, and U0122. Codes were cleared by the dealer and smog certificate issued. The car was fine for 2 months. Yesterday, the car would not start and the check engine light came on again. After about an hour, the car started as if nothing was wrong. I did notice that the air conditioning temperature changed from the previous setting so something must have been reset. The faults indicated that the transmission module lost communication. The dealer checked the wiring/harness for damage, and found none. Anyone have ideas? Bad control module????