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Lakerboy909
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SPN 105 is the intake manifold temperature sensor, you didn't mention what year your truck is. The earlier engines used 2 sensors one for pressure the other for temperature, the sensor is capable of doing both so newer engines only had 1 sensor. Regardless the temperature sensor is located in the back of the intake manifold. If you have a older engine with 2 sensors switch them and see if the fault goes away. 

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On 12/4/2016 at 0:13 PM, Macktech689 said:

SPN 105 is the intake manifold temperature sensor, you didn't mention what year your truck is. The earlier engines used 2 sensors one for pressure the other for temperature, the sensor is capable of doing both so newer engines only had 1 sensor. Regardless the temperature sensor is located in the back of the intake manifold. If you have a older engine with 2 sensors switch them and see if the fault goes away. 

I have a 2012. Thank you sir for answering. I've had this truck for a year now, it's been a good truck for me. Where can I find aftermarket stuff for macks? For example, exhuast manifold, exhaust systems etc.... Dynaflex said the freightliner kit might fit on the mack, and I can't really find anything with bully dog or anybody. 

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