Input air sensor reading +40 OBD2
#1
06-13-2021, 05:13 AM
Input air sensor reading +40 OBD2
Hi all I bought a new OBD2 and it reads better on x300 4.0na . I see now that my IAT is reading +40 c. Unplugged I get -40 c. I put a potentiometer in line to increase resistance and got -18 c turn pot and got -19/20. I am assuming that my IAT is fried. Any thoughts?
#2
06-13-2021, 06:59 AM
Veteran Member
#3
06-13-2021, 12:06 PM
Senior Member
The inlet air temp and engine coolant temp sensors are thermistors that when unplugged are not powered as they should be
They can be calibrated against a chart on page 86 and 78 as your meter should be powering them if you use a 9 volt battery powered meter
http://www.jagrepair.com/images/Trai...20-%202000.pdf
They can be calibrated against a chart on page 86 and 78 as your meter should be powering them if you use a 9 volt battery powered meter
http://www.jagrepair.com/images/Trai...20-%202000.pdf
Last edited by Parker 2; 06-13-2021 at 12:30 PM.
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