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Title: Big problem with OBD.......Check Engine Light comes on!!
Review: Great product that worked to solve my pinking knocking problem while towing a boat or trailer. The only problem is the lower temperature made my check engine light come on. I cleared it but after a few days the same code came back and tripped the light. The code was "engine too cold too long" meaning the OBD computer knew the temp was cooler but thought it was a malfunction. No way to get the light to stay off. Ignored it until I had to get a smog check and it would not pass because the check engine light has to be reset and the vehicle driven 75 - 100 miles before the smog station computer will pass the vehicle. I had to remove it and replace the stock one to get my truck smogged. Hyper Tech customer service said they knew of the problem and to change it back to stock. I am very disappointed because the Hyper Tech stat made my truck run better.
