Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Boxster General Discussions

LinkBack Thread Tools Display Modes
Old 03-12-2020, 11:49 AM   #1
Registered User
Join Date: Dec 2019
Location: Los Angeles
Posts: 34
P0430? What to do?

Hello, I scanned a p0430 code on my 01 Boxster. I'm wondering what steps I should take to find the problem. Should I start by clearing the code with my scanner? I'm a newbie with scanner tools. If I clear the code and it's still an issue will the CEL come back on? After that, what should I check? Thanks for your help.

Black_Boxster is offline   Reply With Quote
Old 03-12-2020, 12:38 PM   #2
Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 5,285
P0430 indicates that the main three way catalytic converter on bank 2 conversion level is too low. Clear the code, if it returns, you need a new cat.
ďAnything really new is invented only in oneís youth. Later, one becomes more experienced, more famous Ė and more stupid.Ē - Albert Einstein
JFP in PA is online now   Reply With Quote
Old 03-13-2020, 06:47 AM   #3
Registered User
Join Date: Sep 2016
Location: Stow, MA
Posts: 901
It can also be a bad O2 sensor, the post cat one. Even if it isn't the O2 sensor you may be able to keep it going and pass inspection for a while by changing your driving style. Don't tool around at low revs, but let the engine sing and drive in a lively style. I have a dying cat that I have kept going for 2 years now by doing this. I do have a replacement manifold/cat sitting on a shelf, ready to go in if the light comes on hard or I need to pass inspection.
2004 Boxster S Silver - FUNTOY
2002 Boxster Base Guardsy Red - FUNBOX
1987 Caterham Super 7 1700 Supersprint
2009 Mercedes Benz CLK 350 convertible
1941 Dodge Luxury Liner Coupe
Anker is offline   Reply With Quote
Old 03-14-2020, 11:47 PM   #4
Registered User
Join Date: Sep 2017
Location: SF Bay Area
Posts: 91
BB, donít jump too fast at changing the o2 sensors. I had p043 codes as well and I instantly jumped to changing all four o2 sensors, which didnít solve the problem. It took about 1 1/2 years of messing with 2- AOS, oil filler tube, and various vacuum leaks on the intake manifold. I would clear it and it would go away for about 200-300 miles but would come back with p0430, p1130, p1128, p1133 codes. I finally found cracks on the oil filler cap Oring that probably contributed to the codes and also cracks on the gas cap. Since replacing both caps Iíve not had a code in six months and 5k miles. Not saying it was only the oil and fuel caps, but rather start looking at the small stuff first before jumping to the o2 sensors and the cats. My 2 cents.

Steelepuls is offline   Reply With Quote

Thread Tools
Display Modes

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -8. The time now is 05:59 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page