My truck is running fine but my check engine light went on 3 weeks ago and I had it scanned at advance auto and it said p 0442 small evap leak so I figured it was my gas cap. Well it never went off so I went there to buy a cap today and had them scan again. It said I had 12 codes showing
P0442, U1255, U1000 U1301 C0300 C0305 C0306 C0321 C0327 C0359 C0374 C0379 I thought the guy had put something in the computer wrong so I went down the road and had it scanned at another advance and they pulled just the p 04 42 code. So I thought that was weird and went down the road to autozone had them scan it and they got the 12 codes also??? Anyone have this problem before? Is there one thing that might be triggering this?:any help is very much appreciated

 

clear all the codes. when the ses light returns, diagnose those dtc...post them here.

 

How do I clear all the codes? Do I have to take it in to have them cleared? Or disconnect the battery? Thanks guys

 

with a scan tool. when you post the returning dtc include year model engine size etc

 

I think Auto Zone can do that for you