how do you determine the exact cause for p0480 code

Question

showing p0480 and p0483 codes

Answer 1

Hi there,

Both these codes indicate an issue with the cooling fan relay. Unfortunately, I can't tell you specifically what needs replacing, but I can give you a list of possible causes for this code. 

P0480 CHEVROLET - Cooling Fan Relay Control Circuit

Read more: https://www.autocodes.com/p0480_chevrolet.html