Check engine light on

[AZRoverLR4wm]

Just finished a cooling system upgrade, and my car is running fantastic. However, new issue, CHECK ENGINE LIGHT is on. Strange because the car runs flawlessly, accelerates flawlessly, and has absolutely no issues that I can see.
I have removed and cleaned the mass airflow sensors with mass airflow sensor cleaner. I have also added BG44K to my gas tank. Check engine light is still on.
What should I be looking for next?
Attached is a picture of the current faults via the GAP IIDTool. Wouldn’t a check engine issue be shown in current faults? Anywhere else I should be looking On the tool? Otherwise, I don’t think I see anything that would warrant a check engine light.
Any thoughts GREATLY appreciated!

 

[f1racer328]

Stupid question but have you tried clearing it?

 

[AZRoverLR4wm]

I have cleaned the MAF Sensors. Cleared faults with the Gap tool. Re-ran current faults and that is what is shown in the picture. Do I need to do something in addition? Is there a special process to clear a check engine light?

 

[scapistron]

Do you know if you had those codes before you did the cooling system upgrade? I would guess something is not plugged in.

 

[AZRoverLR4wm]

Good thought, but I believe everything is plugged back in..

 

[AZRoverLR4wm]

This may be a really dumb question, but How do you reset a Check Engine Light using the GAPIID Tool?

 

[scapistron]

Right there at the bottom, "clear all"

 

[AZRoverLR4wm]

Ok I did that. Didn’t clear it. Do you think it would help to disconnect the battery?

 

[Rover Range]

Is the check engine light actually on?

 

[powershift]

Did you have a mess with coolant spilling onto connectors? I would inspect the connectors.