2011 F150 5.0 230k miles. I have replaced the exhaust and intake oil control solenoid actuators and connectors. The exhaust camshaft position sensor. All on bank 1 passenger side. All motorcraft parts. I get 9.9 volts at the solenoid plug from pin to pin from the connector with key on not running. I get 12.4 volts to power side pin. And 2.5 volt on the pcm pin signal with key on not running. All 4 solenoids read the same volts on all connectors. Pcm reference volts are 5 volts. From pcm harness to signal connector pin .2 ohms. It is intermittent. The truck does have rust under the body. The truck runs good for the most part. The light comes on and off on its own. At times when the cel comes on, i feel the gas pedal vibrating.

 

From what I remember reading Ford requires greater than like 10.2 volts on control circuits so 9.9 may not be enough.

 

Just a thought, where does the PCM ground wire go to?
If there is a ground for it at the firewall I(don't know at the moment) I would run a test ground wire from the battery terminal.
It doesn't take much to mess up 5 volts.
You got a good ohm reading on the wire but any corroded connection could mess you up.