Question

I got the engine code P0645 on my 2007 Dodge, how can I fix this code?

Answer 1

P0645 A/C control circuit open

Go to the A/C compressor, where the terminal for the A/C clutch attaches (this is a single wire) follow it it will lead to a male and female connecter, there is where you need to inspect for properly connected, it is prone to break at this area,

Answer 2

P0645 DODGE Code - Air Conditioning Clutch Relay Circuit Malfunction
Read more: https://www.autocodes.com/p0645_dodge.html