I have a 2001 gmc 1500 5.3 it has 2 codes p0131 and p0300 should i do 02 sensor first or go with the 0300 code

Question

I have 2 codes p0131 and p0300 what one should i persue first

Answer 1

We don't' think the O2 sensor which triggers the P0131 code could cause the engine to misfire or trigger the P0300 code, but it may not be related to the P0300 code. You should start by clearing the code and check which one comes back. Unfortunately for the P0300 code, you may have to replace the coils.

Comments

Code 300 Random cylinder Missfire   Check your Crank+Cam sensors