Posted by Goose on March 15, 2018 at 15:30:39 from (166.182.83.223):
Here's the scene.
2007 Chrysler T&C. SES light came on. Had a code P0073 for a bad ambient air temperature sensor. I didn't have time to mess with it, so my wife had our local Chrysler dealer check it. They replaced the sensor and erased the code. A couple of days later, the light came back on and the same code was set. My wife went back to the Chrysler dealer and the Service Manager said it was probably a problem in a wiring harness and could cost several hundred dollars to track down.
Since I really don't trust that dealer, and since it's a $20 part and takes 5 minutes to change, I replaced it with another new sensor from O'Reilly's. Same Result. Erase the code and about a day or two later it will set again.
Now, I don't know about the rest of ya'll, and maybe I've been lucky, but in all of the years I've been in the automotive business and in automotive service management, only twice on respectable, serviceable vehicles have I run into a problem that was a wiring harness, and both of those were loose grounds. Frankly, I'm not ready to accept that it's a problem buried deep within a wiring harness.
Do any of ya'll have any ideas?
My wife was driving this vehicle, and we were talking about replacing it anyway, so this issue provided the impetus for me to buy a Lincoln MKX for her to drive. I'll either wind up driving this Chrysler myself or selling it, and in either situation this has to be fixed.
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