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Welcome!! :)

Sounds like the PO didn't keep up with maintenance. You should be fine on cooling so long as the rest of the system is working.

As for your secondary injection pump: It isn't supposed to run on every cold start. It only runs if the computer determines that the pump is needed. It sounds like you're in a hot enough place to not always need the pump on a cold start.

If the pump doesn't activate when the computer activates it or it doesn't activate fast enough, you get the code. You will know when the pump turns on because even in the 2014s it sounds like a loud vacuum. :)
 
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