What Sensor(s) should I change? 2010 Eddie Bauer Edition V6 4WD

[Whammo18]

Codes:
P0135
P0141
P0155
P0161
P0403
P0443
P0645

I need to know:

1. How many O2 sensors? How many upstream? How many downstream?
2. What sensor should be replaced first based on above codes?
3. What needs to be changed for a/c clutch relay?
4. There is no gas cap on the car so EVAP code is odd unless it is failing somehow.

What I know:

No fuses appear to be blown.

 

[explorer 2010]

what i know about this
you have to change PCM if all this DTC's come together.

if you solve it, can you please share how did you solved it?

 

[94Eddie]

This user made one post back in 2016 and none since then. I doubt he is still around and checking the forums.

 

[plasticseng]

The original post is very old, but for those who run across this in a search:

I had these same codes about 2 months ago. Note that they are circuit codes. I ran the pinpoint tests that AllData gave me, and it came back to the PCM. I then found this:

REPAIR SERVICE 06-10 FORD EXPLORER 4.0L ECU ECM PCM ENGINE COMPUTER P0403 P0443 | eBay

If you read down in the description, you see all of the same codes listed. It is a common problem with the heater drivers for the O2 sensors.

I sent mine to those guys (EBAY Seller 'your parts source') and they had it back to me in about 4 days. Everything has been great since then.