P0AE0, P0ADC, P0AE7

what are you reading with? you don't want a wild goose chase from incorrect codes.

any symptoms?

how many miles on her?

 

All three of those codes are related to the main relays in the HV battery. The HV battery has three connections to the car harness. The small one is the safety interlock, the medium is 12v power to the relays, the large one is the ecu. Without having dug into this, I would look at the medium sized connector at the HV battery to see if it's not connected. Just off the top of my head.

 

P0AE0=(subcode 228)=Hybrid battery negative contactor control circuit high

P0ADC= (subcode 226)=Hybrid battery positive contactor control circuit high

P0AE7= (subcode 224)=Hybrid battery precharge contactor control circuit high

 

Awesome help as always... Do you have a link or PDF that lists all the error codes that you got this from? Would love to have access to it in a way that makes it so I stop wasting so much time searching when I need to find out what error codes mean.

 

It was just info from the Bentley manual

 

If you remove the trunk tray, you'll see the HV battery. The driverside of the battery case contains the electronics. To access those three plugs, you would need to remove the driverside cover of the battery, not the main cover. It has two nuts where the main cables enter, two bolts on top and one bolt at the bottom back, a couple inches from the safety disconnect.

 

Relays very rarely fail, especially all three at once. Every time someone I know changed a relay on a battery pack it turned out to not solve the problem... I'd start with making sure the 12v battery is healthy. Then clear the codes and see if they come back, then check to make sure the orange safety plug is click into place, then inspect connections. I'm thinking corrosion, if anything? Or perhaps the 12v power is no longer reaching the pack due to blown fuse or damaged wire.

 

What brand of battery did you install?

 

I had the same codes P0AE0, P0ADC, P0AE7, and P3004. After changing module 10 three times because # 10 would not charge,
I figured it had to be in the wires. Checked the volt sensor wire (ok). Checking the wires coming from the
interrupt plug I noticed at the module 10 terminal it looked corroded so I changed it with an extra one I had. This
cleared the codes. I'm including a picture of what one of my batteries that had these wires soldered since it
must have been shorted also.

 

Dorman solders those connectors at the crimp.
The OEM crimps are pretty susceptible to corrosion at those cables. The solder makes a much better connection.