I get an engine light after about an hour of driving. I attributed this to the fact that I have a Hypertech chip that optimizes torque. I also have a 160-degree thermostat. Last year my fan died, so I replaced it with an after-market one. I ran the power from a power point in the fuse box through a switch on the dash. That way I can turn it off and on as I need to. The ground is hooked into my stereo ground, which goes right to the battery. The wiring to the original fan got all dry-rotted so, I couldn’t put in a stock fan now unless I wanted to spend a chunk of change to get all new wiring. I’m not sure if I even have temp controlled fan switch or not. Even tough I have a 160-degree thermostat with the Hypertech switch, could a lack of temp switch be causing the computer to malfunction and give me the engine light? My car seems to be running great. (But the engine light gets annoying)

 

Pull the code and find out for sure


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