P0420 code but passed emissions?? - North American Motoring

Stock Problems/Issues Discussions related to warranty related issues and repairs, or other problems with the OEM parts and software for MINI Cooper (R50), Cabrio (R52), and Cooper S (R53) MINIs.
Sponsored by:
Sponsored by:

P0420 code but passed emissions??

Thread Tools Search this Thread
Old 05-17-2018, 03:14 PM
Mini_slo Mini_slo is offline
Thread Starter
Join Date: May 2018
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
P0420 code but passed emissions??

Hello, i have mini cooper r50, 2003, 116hp. The problem is that CEL is appearing every few days with the same p0420 code (Cat. efficiency bellow and uncorrect signal). I take a car to test the emissions and everything was perfectly okay so i assume that cat. is okay. O2 sensors readings: pre-cat: oscilating between 0,1-0,9v, post cat.: oscilating between 0,75-0,9v. Is there a possible problem with timing of the engine?
Thanks for your help.
Reply With Quote
Old 05-17-2018, 05:50 PM
AZdsrt AZdsrt is offline
6th Gear
Join Date: Jun 2013
Location: Phoenix, AZ
Posts: 1,306
Thanked 18 Times in 17 Posts
Here in AZ emissions testing is strictly by the OBD port. Would have never passed here.
Reply With Quote
Old 05-17-2018, 06:02 PM
Whine not Walnuts's Avatar
Whine not Walnuts Whine not Walnuts is online now
Join Date: Mar 2013
Location: Fuquay Varina, NC
Posts: 4,465
Thanked 436 Times in 404 Posts
Going to move you to the Gen1 Stock Problems/Issues section.
Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
Thanks Forum - new owner 08miniS08 R56 :: Hatch Talk (2007+) 9 05-15-2018 08:27 AM
Need a little help with some codes my Mini is throwing. mschandler76 Stock Problems/Issues 1 05-04-2018 08:02 AM
FS:: K&N Intake, S-Lite Wheels, Suspension Parts 1R53 MINI Parts for Sale 5 04-22-2018 09:40 PM
On Board Diagnostic Codes from secret menu (**NOT** OBD Trouble Codes) and CCID-029 cjv2 Stock Problems/Issues 4 04-02-2018 06:21 PM
FS:: Brand New K&N Typhoon Cold Air Intake Kit + Parts 1R53 MINI Parts for Sale 0 03-21-2018 07:36 AM

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

All times are GMT -7. The time now is 12:51 PM.

North American Motoring is an independently operated web site supporting MINI owners and enthusiastsworldwide. As such it has no official relationship with MINI USA, BMW AG, or BMW of North America.All original artwork and design is Copyright © 2002-2004 North American Motoring.
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.