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Old 03-02-2013, 12:51 PM
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Codes?

When I retrieve DTC's I get codes P0541 and P0640. Can anyone tell me what these are and if they needed to be fixed ASAP or how to clear them?
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Old 03-02-2013, 01:32 PM
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First, anytime you want to know about a code, just Google "Ford 7.3 PXXXX" (you know, the "X's" are your code )

Next those Both come back to the AIH (something you don't really need anyway). Did you connect a Boost Gauge, in the AIH port, with the adapter plug?

If so, that's why.

If not, I wouldn't worry about it. But you could see if it's unplugged or it has another wiring issue (I doubt the AIH itself is bad, they're so rarely used..)
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Old 03-02-2013, 02:34 PM
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Rog. I still have the sensor hooked up but have a 6637 intake without the intake housing
And no hole drilled for the sensor so it's just tired up away from stuff that could damage it.
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Old 03-02-2013, 03:29 PM
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Yea, but, the AIH is an actual Heater Element in the spider and used to control "wet-stacking" during extended idle periods under certain conditions. Many people have removed this element (seen as a, useless, restriction) in order to use that hole for their gauges Boost Sensor.
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