ENGINE LIGHT ON AND WON‘T PASS EMISSIONS IT IS NOT IN THE MANUAL OR 20.00 BOOK I BOUGHT AT AUTO ZONE IT ‘S DIAGNOSTIC PRINTED OUT THIS MESSAGE OF A MALFUNCTION OF THIS PART??? HELP
That depends on which part of the system you need. The most common problem in that system it the secondary air injection pump. It is located under the vehicle kind of in a little corner between the frame rail and crossmember. Because they are under the truck, they tend to get dirt, debris, and moisture in them which causes them to go bad. Another common failure that we see where I work is people drive the vehicle through deep water and the pupm gets full of water and shorts out. Anyhow, there are other parts to the system, but that is the most common to fail.
