Thread: CEL w/no AC
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Old 05-31-2015, 04:36 PM   #3
extrashaky
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Quote:
Originally Posted by thebus View Post
I have a scan gauge 2 on the car which wasn't working when he came back so I restarted it and it kept giving me codes not one specific code.
Did you get a code U0073?

This car's computer does not play well with scanners attached to the OBDII port when the car is started. It's fine until you stop and restart the car, but when the car starts up with the scanner attached, the onboard computer gets confused. If you make sure your scanner is off or disconnected when you start the car, it will not throw the code.

U0073 will cause a CEL, AC doesn't work, cruise control doesn't work, and the car goes into limp mode where it doesn't provide full power. You may also see some sluggish performance after you clear the code until you have stopped and restarted the car several times. It's not a real problem and causes no damage, just an inconvenience.

Might be something else, but next time it happens check for that.
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