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Have a 2014 ford e450 with 6.8 liter engine. Work done to it before I got it on maf. Have a p0112 on it with cel on. Tape everywhere on it and by pcm connector. Took it all off and saw no splices or damaged wires. Using ids I pull up iat temp and voltage and cht temp pids. After 8 hour cold soak pids are as follows cht 75 degrees, iat 215 degrees and voltage at .42. Koeo unplug maf and jump iat to sigrtn. Pids read 387 degrees and 0 volts. Take jumper off and goes to -30 degrees and 4.65 volts. Replace sensor still the same as before. Just for giggles check resistance from pcm connector to maf connector. All good. Wiggle test with ids on too. No changes. Now does the pcm have internal resistor in it for the iat? I am wondering if the work before did something internal? Is there a test I'm not using to check that problem? Code does clear and will come back but not immediately. When replacing maf I did clear Kam. Thank you for the help.
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