Wiring schematics are attached.

 

Thanks that is super helpful. I will see if I can find the the exact wires in question at the connector tomorrow.

 

The APP shares a VREF leg with the FRP and CKP sensors (which you also have codes for) and and several other sensors. The P06F6 code indicates a fault with that VREF circuit which is shared from within the PCM. If you look at the wiring diagram it could confuse you because the APP has dedicated circuits with no external splices in the harness. Just thought I would point that out in case diagnosis gets deep. You need to identify exactly which APP circuit is causing the problem though - it does not necessarily have to be the VREF circuit. An open circuit should not affect other sensors but a short to ground or another relevant circuit will. The last time I toiled with similar codes the root cause was the CKP sensor wire (which was not properly secured to the engine front cover) had rubbed through on the serpentine belt causing VREF to short to signal return. That one literally took down the other sensors causing a no-start concern...

The fact that you discovered the fault can be duplicated by moving connector C210 is a nice lucky break. I definitely recommend testing/monitoring the affected circuits using an ohm meter and focus your attention to the harness and that connector. Sometimes it comes down to pin fit - the female terminal inside the connector becomes loose causing intermittent continuity. This is usually caused by vibration when connectors and harnesses are not properly secured. If you determine this is the root cause the terminal pins can be replaced individually. You could also cut the affected circuit and bypass the connector with an overlay. (not my favorite way to repair bad connections but I have seen it done)

Use the wiring diagrams Kaakau620 provided you. Be sure to disconnect the batteries when measuring resistance.

 

Thanks for the advise. I will get back after it again when I finish work today. Great idea on the overlay if I can find the specific wire to APP causing the fault I think I will just bypass the connected at least for troubleshooting.

As a side note when I move the C210 to a point I see the APP sensors outputting reliably the fault for APP clears, but the FRP, and CKP, VREF A, have not cleared since I started having issues.

 

Thanks for the help on this. I thought bypassing C210 worked, but after driving about 10 miles and hitting a bump gas pedal died again. After this the pedal would never work at all. With My Scan tool I could see Accelerator position E was always now at 0. After spending the day shaking the harness from C1232B I was having no luck. I decided to cut the 3 APP2 wires (29, 63, and 66) one at a time at the PCM connector. I started with 66 APP2 VREF, after cutting I confirmed 5v coming from PCM. I ran an overlay all the way to the pedal. Everything started working again, and all FRP, CKP, and Circuit A voltage errors cleared, which has not happened since the issue first came up. I am guessing this wire was either shorted to ground or another circuit somewhere in the harness causing the code. I buttoned up the overlay nicely and and will just keep the overlay as the permanent fix.