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2003 eatc self-test

 
  #31  
Old 07-10-2018, 01:17 PM
seminole629
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Temp display reads code 1259

Hey guys 1st time posting In here. My 04 Expedition all of the sudden displayed -40 degrees outside and Rear Defrost wont turn off. I did the self test mentioned and it showed a 1259 code. But I haven't been able to find what that means.
I WILL TAKE ANY HELP!!! THANKS!!!
 
  #32  
Old 07-10-2018, 01:49 PM
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Originally Posted by seminole629 View Post
Hey guys 1st time posting In here. My 04 Expedition all of the sudden displayed -40 degrees outside and Rear Defrost wont turn off. I did the self test mentioned and it showed a 1259 code. But I haven't been able to find what that means.
I WILL TAKE ANY HELP!!! THANKS!!!
I dont know about the rear defrost but -40 indicates and open circuit to the ambient temp sensor at the front grille area or a bad sensor. Try to address that first and that may fix it to run the ac again.


 
  #33  
Old 07-10-2018, 03:22 PM
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A "1259" DTC is defined as "A/C solar radiation sensor open circuit". The ambient temperature sensor would post codes of 1255 or 1257.
 
 
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