P0200 GMC -

Question

Post engine GMC V8 6.0 overhauling I have these two problems P0200 & P0300 and engine flashing light that turns off once a while and comes back what do you think the cause of this?
Note: before engine overhauling I did not have this problem.

Answer 1

Hi there,

The code P0200 indicates an issue with the injector circuit. Here is some info for you.

P0200 GMC - Injector Circuit Malfunction

Read more: https://www.autocodes.com/p0200_gmc.html

The code P0300 indicates misfires on the cylinders. Here is some info for you.

P0300 GMC - Cylinder Misfire Detected Random Cylinders

Read more: https://www.autocodes.com/p0300_gmc.html