what is p11af

Question

working on a bus, engine code read p11af. I cant figure out what it is, the bus is a 2010 Chevy, 6.6 liter duramax diesel

Answer 1

Hi there,

This code indicates an issue with the NOx sensor. HEre is some info for you.

P11AF CHEVROLET - N02S 2 Performance Signal High During Moderate Load Sensor 2

Read more: https://www.autocodes.com/p11af_chevrolet.html