Weird engine codes and can’t find the cause.

[ah-z]

I have a 2021 3.6 etroque motor and for some reason it’s constantly throwing U02A9, P023B, U05AA all related charge air coolant pump which is on a turbo motor but not a 3.6.
In turn my engine fan is coming on at about 170deg as well.

any help would be great

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[mwilk012]

It’s a bad title for the fault but it is referring to the auxiliary cooling pump for the 48V battery system.

 

[ah-z]

Welp i guess i need to replace that pump

 

[mwilk012]

Welp i guess i need to replace that pump

Well that’s certainly one strategy

 

[ah-z]

I'm hoping its just that cause the pump is $250

 

[alphawolff]

I'm hoping its just that cause the pump is $250

Assuming the reservoir is full you should verify the pump has power, ground, and proper lin bus voltage (about 10v).

 

[ah-z]

I'm getting verified ground from the back wire on the plug at the pump, I'm also getting 12v from both the red and white wire, as well as the solid red wire. Even when the vehicle is turned off.

 

[alphawolff]

I'm getting verified ground from the back wire on the plug at the pump, I'm also getting 12v from both the red and white wire, as well as the solid red wire. Even when the vehicle is turned off.

Check for Short to voltage on the white wire. Lin bus should be about 10v, not 12

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