Gm Egr Valve Wiring Diagram

Cleaning the egr valve can sometimes clear the code.

Gm egr valve wiring diagram. This type of egr valve has made the auto repair industry and gm a ton of money over the years since its prone to carbon blockage. In particular the 5 wire linear egr valve used on many different gm vehicles. The testing procedures shown in this video apply to all electronic style egr systems. In particular the 5 wire linear egr valve used on many different gm vehicles.

Gm vehicles are equipped with internal computers that send signals for the check engine light to appear when a component has failed. When the light comes on a code is sent out which you can read using a scan tool. Open 5v reference circuit from a bad engine computer ill also show you how i repaired this problem without. Well the good news is that this is an egr valve and egr valve system that is very easy to test and diagnose and this article will walk you thru the entire diagnostictroubleshooting process.

The procedure to test an electronic egr is a bit different and requires a multimeter. The car being tested has a 3100. When code p1406 appears the exhaust gas recirculation egr valve has failed. The egr valve thats covered by this article are for 31l 34l and 35l gm vehicles from 2000 to 2009 models years although some late 1999 models use this type of egr valve too.

Identifying the egr valve. High volts could mean there is a blockage somewhere within the egr valve and no voltage could signal a problem with the valve and computer communication. To make sure this tutorial applies to your specific vehicle check this section out first.