013 ProStar with the MF13 Ambient air temp code

Discussion in 'International Forum' started by 2013Maxx, Sep 9, 2022.

  1. 2013Maxx

    2013Maxx Light Load Member

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    Jan 17, 2018
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    Hello I have a 2013 ProStar with the MF13 (2012 build date).. Getting a code for ambient air temp sensor SPN 171 FMI 3.. I hear they’re 2 sensors on the truck. I found one under the front of the truck near the horn. Where is the other sensor located? Thanks.
     
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  3. 2013Maxx

    2013Maxx Light Load Member

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    Jan 17, 2018
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    Update, the second sensor is located on the wire harness that runs along side the left frame rail between the back of the cab and the drive axle wrapped in tape..
     
  4. 2013Maxx

    2013Maxx Light Load Member

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    Jan 17, 2018
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    Ok another update.. I changed the sensor and the truck is still throwing a code for the sensor. I’m at a loss. Any help is appreciated.
     
  5. 2013Maxx

    2013Maxx Light Load Member

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    Jan 17, 2018
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    Update, a plug on the wire harness was slightly loose. I’m back in business.. :)
     
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  6. 2013Maxx

    2013Maxx Light Load Member

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    Jan 17, 2018
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