Nor sure what that is. After the coolant repairs, and the engine codes, I did replace the upstream and downstream 02 sensors. And today, I unhooked both of them and reconnected all connectors on everything I originally unhooked. And inspected the wires, etc.

 

It's the upstream O2 sensor. Can you reach it and disconnect the connector?

 

Thats pretty easy one to get to, yeah.

 

Disconnect it. Insert key and press start button (engine off).

The connector has 6 wires, one of which is orange. If you measure voltage at the orange wire pin in the connector using the battery (-) terminal as ground, you should read 12V.

 

I would be interested in knowing more about these^

 

Is the fluctuating voltage readings for fuses F02-F05 with the engine running reproducible?

 

I unhooked everything I did when I did the water pipe replacement. And re-secured everything and checking all the wiring and connectors. Still running in limp mode, so on Thursday, I dropped it off at a local shop. He says I didnt secure the upper charge pipe properly. He repaired that and another coolant leak under at the 90 elbow under the tank. No longer in limp mode. However, he reported that new codes came on. Traction control, parking brake and abs. Claims the ABS control module is bad and the new part is 3100. Or buy used and have it programed. Carry otherwise running good again

 

Glad to hear limp mode is eliminated.

Did the mechanic think that the coolant leak triggered the multiple original fault codes and electrical issues?

 

he thought that because the charge pipe wasnt hooked up, air flow was compromised and caused all the 02 readings, etc.

 

Do you have any knowledge or experience with replacing the ABS control module w Hydraulic? Apparently these are a few thousand bucks and have to be programed to the car. Ive seen them for sale used at places like Allmagaparts for $225 wirh warranty, but they have to be programmed at dealer or expensive scan tools.

 

Those codes all hitting at once usually points to a shared electrical ground or a blown fuse in the engine bay. I had a similar phantom CEL party on my 2011 and it was just a loose connector near the ECU. Check your wiring harness again before you start swapping sensors.

 

I must agree. Only codes P0304 and P0003 could conceivably be caused by the disconnected upper charge pipe. The other codes are purely electrical. I think the mechanic may not be sharing all the details.

In addition, many fault codes that would be expected to be triggered by a disconnected charge pipe were not seen.

 

Did you have any ABS codes prior to the mechanic's recent work? What specific ABS code(s) do you now find stored in the ABS control module?