General Tech Help Good at troubleshooting? Have a non specific issue? Discuss general tech topics here.

Failed emissions with codes

Old 05-24-2013, 04:55 PM
Thread Starter
Join Date: May 2013
Posts: 2
Default Failed emissions with codes

1998 Honda Accord 4 cyl
Failed emissions with the following OBD Trouble Codes:

P0420 Catalyst System Efficiency Below Threshold (Bank1)
P0401 [COLOR=blue !important][COLOR=blue !important][COLOR=blue !important][/COLOR][/COLOR][/COLOR]Exhaust Gas Recirculation Flow Insufficient Detected
P1457 (no description but I have been told it is an EVAP leak?)

My wife lost gas cap 3 years ago and has driven the car for 50 miles. I bought the original gas cap after few days in Honda Dealership and week after I got engine light on. I had engine light on for the last 3 years and always passed emission test except this year because now test check computer as well.

Please help.
Old 05-24-2013, 08:00 PM
Join Date: May 2007
Posts: 135

I've had that P0420 code and it seems like everyone gets it at some point in an Accord's life.

Here is a post I did awhile back on it, basically I looked for leaks, looked at O2 sensor and the catalytic converter (it ended up being a combination of all 3 but an easy fix).

This should address the P0420 code and usually the other two will hopefully clear out as well.

Here is the link to the post
Old 05-24-2013, 08:36 PM
Thread Starter
Join Date: May 2013
Posts: 2

Thank you mamtsberg I will try.
Related Topics
Thread Starter
Last Post
General Tech Help
02-06-2009 11:26 AM
General Tech Help
07-31-2008 07:31 AM
General Tech Help
06-15-2008 03:28 PM
chandlers dad
General Tech Help
09-30-2007 01:32 PM
General Tech Help
12-09-2006 08:29 AM

Thread Tools
Search this Thread
Quick Reply: Failed emissions with codes


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 and affiliated sites.