Hi, I have problems with my car and it shows up code 16 and I would like to know where is the main relay for the fuel injector. I changed the computer and I still don't have a sign it still shows code 16. What could it be? Please help

DTC 16 = A problem in the fuel injector circuit.

I don't believe the problem involves the main relay. Start engine and listen for clicking coming from each fuel injector. Disconnect 2-P connector from any fuel injector that does not click. Measure the resistance between the two terminals of the injector. Resistance should be around 10 to 13 ohms--you should verify this number for your car. Replace any injector that's outside of spec.