p2073-MAF issues

Ive got my MAF connector apart and am doing some testing. I have come across that pin 5 has voltage, about 4.9v on it with KOEO. Testing says there is to be NO voltage here, and if voltage is found, repair the short to power. If I ohm out to pin 2 & 3 to pin 5 I get continuity. But if I unplug the connector at the PCM, that all goes away.


Can anybody else tell me if their seeing voltage on pin 5 with KOEO and sensor unplugged?

Can someone take voltage at maf sensor connector unplugged koeo?

Bump.

Found all trucks have this voltage present even though Ford says they shouldn't.

New maf, new egr valve, no change

Is that the maf/map correlation code? Seen probably 3 that have been due to dirty air filters.

Yes it is.

Is it the correlation code at idle or at higher load?

We have a 2012 F550 truck at the fire dept that has the correlation at idle code, reoccuring after driving after clearing it. Was reading somewhere that it was likely a dirty MAF sensor, but that it could be more serious things like gasket leakage somewhere (not sure where tho...)

Idle. It's gone.. for now