p0420 - Chevrolet Forum - Chevy Enthusiasts Forums - Threads Tagged with p0420

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Threads Tagged with p0420

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Threads Tagged with p0420

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Unhappy

2.2 ecotec, cavalier, p0300, p0420, stalling at stops

Car Randomly Dies but Keeps Driving.

lilnoah on Nov 11, 2024

May 10, 2026 2:47 AM
by RD_Atlanta

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2

11,792

1500, 1999, 53, 99, chevy, code, fix, o2, p0171, p0174, p0420, po420, sensor, silverado, threads

1999 chev silverado 5.3 code P0171, P0172 and P0420

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Multi-page thread

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MinnesotaBum on Sep 10, 2009

Oct 21, 2020 9:18 PM
by Zwingsterboss

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10

53,724

Silverado, Sierra & Fullsize Pick-ups

catalytic converter, p0101, p0404, p0420

Have 3 new codes...are they related?

Hopwall765 on Apr 8, 2018

Apr 11, 2018 11:55 AM
by Hopwall765

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4

1,507

bad, carlo, catalytic, chevrolet, chevy, code, converter, express, graph, monte, o2, p0420, p0430, p420, sensor, sonic

P0420/P0430 OBD code - what a bad catalytic converter looks like

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Multi-page thread

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CableSux on Sep 8, 2013

Aug 10, 2017 10:28 PM
by ajmboy

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10

82,937

Express, Savana & G-Series Vans

Exclamation

2015, catalytic converters, chevy tahoe, p0420, p0430

2015 Chevrolet Tahoe LT P0430 Diagnostic Code

SalStone on May 25, 2017

May 25, 2017 12:50 PM
by SalStone

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0

2,681

Tahoe & Suburban DIY and Useful Threads

check engine light., mil, p0341, p0420

MIL on: codes P0420 and P0341

malibuboo on Aug 22, 2015

Aug 22, 2015 10:25 AM
by malibuboo

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5,611

catalytic converter, new exhaust, p0420

Popped P0420 Code After New Exhaust Installed

Drugar123 on Apr 13, 2015

Apr 13, 2015 9:09 PM
by Drugar123

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4

6,246

Tahoe & Suburban

Exclamation

p0230, p0420, wipers

09 p0230 and p0420 codes + wiper issue

Carve on Apr 9, 2015

Apr 10, 2015 7:21 AM
by tech2

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1

3,510

p0102, p0103, p0420, p0430, suburban

99 Suburban p0102, 0103, 0420, 0430

robsonak on Dec 19, 2014

Dec 23, 2014 7:39 AM
by in2pro

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3

5,664

Tahoe & Suburban

0420, chevy, code, p0410, p0420, solutions, suburban, trigger

Air pump and p0410 & p0420

WBrosVenture01 on Mar 2, 2013

Oct 26, 2013 7:50 PM
by WBrosVenture01

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2

6,533

2007, aveo, chevy, codes, p0420

2007 Aveo code p0420 HELP!!!!

zombiebanana88 on Sep 15, 2013

Sep 15, 2013 5:13 PM
by zombiebanana88

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21,296

2002, 98, c1500, catalyst, chevy, efficiency, low, p0420, po200, silverado

2 Attachment(s)

$50 2002 silverado c1500

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Mikereynolds9 on Apr 2, 2013

Apr 4, 2013 3:11 PM
by Mikereynolds9

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5,197

Silverado, Sierra & Fullsize Pick-ups

2005, 99, carlo, chevrolet, chevy, code, codes, dose, ls, lumina, monte, p0171, p0420, p171, ss

Code p0171

Brian99_03 on Feb 20, 2013

Feb 20, 2013 8:29 PM
by tech2

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1

8,739

Monte Carlo & Lumina

Cool

02, 2002, catalytic, chevy, clogged, converter, cost, install, p0420, recalls, replace, sensor, suburban, tahoe, threshold

2002 Suburban LS - Catalytic Converter

Delray1969 on Mar 21, 2012

Jan 19, 2013 10:57 AM
by markonion7989

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7

21,502

Tahoe & Suburban

02, 03, 0420, 09, 2003, 2008, 31, aftermarket, chevrolet, chevy, code, converter, malibu, p0420, po420

P0420 Code 4th Converter

franke on Dec 13, 2012

Dec 14, 2012 3:50 PM
by franke

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4

7,726

Question

actual, code, data, delays, fault, frame, freeze, gm, mastertech, p0420, recording, set, stored, tech, truck

ODB II Freeze Frame Data Help

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Multi-page thread

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Tegnus on Jul 31, 2012

Sep 6, 2012 12:17 PM
by Tegnus

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14,849

0420, 2003, 38, cap, dies, filler, impala, ls, oil, p0420, pcv, removed, solutions, valve

Stumped!

Dazed & Conused on Sep 3, 2012

Sep 5, 2012 5:26 AM
by junkman104

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1

2,103

1500, 1998, c1500, chevy, code, full, p0420, silverado, size

p0420

Rick Blackburn on Apr 2, 2012

Apr 2, 2012 9:01 PM
by MDTAHOE

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1

3,102

Silverado, Sierra & Fullsize Pick-ups

07, 1999, 2007, chevy, ckt, code, misfire, miss, p0420, pickup, plugs, po420, position, rangeperf, sensor, silverado, spark, tpspedal

2 Attachment(s)

miss and a po420 code on a 07 newstyle silverado

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Multi-page thread

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94racing on Feb 6, 2012

Feb 22, 2012 7:38 AM
by 94racing

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16

43,278

Silverado, Sierra & Fullsize Pick-ups

2001, acceleration, blinks, cableado, chevrolet, chevy, code, de, egr, engine, light, p0420, service, ses, sluggish, time, valve, venture

2001 Venture is Sluggish

cfdengineer on Jun 24, 2011

Jun 26, 2011 9:34 PM
by my3girlz

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1

5,289

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