Headers/Intake/Exhaust Custom Exhaust? New Headers? Need Opinions on Intakes? Discuss making your ride breathe better here.

EGR Monitor, need emissions test

Old 09-13-2011, 09:17 PM
Thread Starter
Join Date: Aug 2011
Posts: 1
Default EGR Monitor, need emissions test

1997 Monte Carlo
3.1 131K

Got codes P0401 and P0420 a little while back. Replaced EGR and cleared codes. P0420 remained, and long story short I just replaced the cat this week. I need an emissions test. Have a scan tool and I am waiting for all the monitors to reset so I can go test it.

After following the GM drive cycle the best I could, all applicable monitors became ready except the EGR monitor. Cleaned out the carbon from the throttle body and EGR port as well now to see if that was the problem. Drove another cycle the best I could, but still no luck.

Any suggestions as to how to get the monitor ready or what could still be wrong? Thanks!
Related Topics
Thread Starter
Last Post
Monte Carlo Repair Help
04-20-2015 05:15 PM
Monte Carlo Repair Help
01-17-2013 09:58 AM
shovelhead pete
Monte Carlo Repair Help
02-25-2012 06:48 AM
Monte Carlo Repair Help
05-11-2008 09:45 AM
05-31-2007 07:56 PM

Thread Tools
Search this Thread
Quick Reply: EGR Monitor, need emissions test

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.