|Username||Post: EGR (Exhaust Gas Recirculation) Troubleshooting|
03-25-11 05:04 PM - Post#2067126
Hey Smokey - if you think about the conditions under which the ECM performs the EGR test, you'll see why many people may only rarely see the code, and some may never see it. If someone routinely makes a lot of short trips or constant stop/go traffic, the conditions are almost impossible to meet for the test to be run.
Since the ECM's test of the EGR system can only show a valve that isn't opening when commanded to, that's something you can suss out pretty quickly with the Mityvac. In other words, never (or rarely) seeing a code 32 doesn't mean you can rule out EGR problems; if you suspect them then it's time to do the testing with the Mityvac.