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Threads Tagged with p0420

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07, 2003, 25, boost, carlo, cheap, downpipe, extra, give, impala, inch, monte, p0420, ss, zzp

1 Attachment(s)

Downpipe, recommended?

Frosty LS1 on Aug 7, 2009

Sep 8, 2023 11:29 PM
by bumpin96monte

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9

6,228

Headers/Intake/Exhaust

0420, 1998, 2004, 2011, carlo, chevy, code, codes, e85, ethanol, gas, high, monte, octain, p0420, p420

No P0420 code after running tank of E85?

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Multi-page thread

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abro22 on Jul 17, 2011

Mar 16, 2023 11:58 AM
by The_Maniac

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13

17,236

Headers/Intake/Exhaust

01, 2002, carlo, code, cutout, monte, p0420, po420, ss, throw

6th Gen ('00-'05):

Can't Get Rid of P0420 Code....

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Multi-page thread

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michelob on Sep 24, 2014

Feb 11, 2015 07:47 AM
by michelob

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19

13,517

Monte Carlo Repair Help

Talking

inspection, nj, p0420

1 Attachment(s)

Finally Passed Inspection!

Dubstepticon on Oct 14, 2013

Oct 21, 2013 10:36 AM
by ChibiBlackSheep

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5

1,338

General Monte Carlo Talk

2002, 87, carlo, chevy, code, definition, hp, increase, l26, monte, octane, overkill, p0420, tune, v6

Overkill Tune, opinions needed lol

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Multi-page thread

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Franks 03SS on Dec 3, 2012

Oct 6, 2013 07:10 PM
by xxtheshockerxx

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47

7,209

Engine/Transmission/Performance Adders

04, 05551, 10343185, 10343187, 38, adjustment, catalytic, code, converter, grand, monte, p0420, part, policy, prix, special, warranty

CEL- code P0420

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Multi-page thread

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01whitess on Jun 28, 2006

Jul 1, 2013 01:34 AM
by vazquezarnie

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10

36,360

Monte Carlo Repair Help

02, 2004, 3800, anti, cat, catalyst, delete, downpipe, efficiency, fouler, impala, oxygen, p0420, plug, rear, sensor, spark, ss, zzp

ZZP Downpipe & U-Bend Questions (P0420)

Dubstepticon on Jun 7, 2013

Jun 10, 2013 05:30 AM
by ChibiBlackSheep

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8

7,445

Headers/Intake/Exhaust

03, 2003, carlo, cat, chevy, code, exhaust, monte, p0420, p420, rich, running, sierra, slp, tune

P0420 Code Issue

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Multi-page thread

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02CHEVYMONTESS on Feb 20, 2013

Feb 23, 2013 03:52 PM
by 02CHEVYMONTESS

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33

15,986

Monte Carlo Repair Help

02, 04, 38, carlo, code, coolant, located, low, monte, p0420, po128, sensor, supercharged, temp, temperature, thermostat

Thermostat, Temp Sensor, and O2 Sensor

farmerjg on Feb 5, 2013

Feb 7, 2013 10:05 PM
by The_Maniac

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6

12,057

Engine/Transmission/Performance Adders

38, 98, bung, carlo, cat, distance, easy, emulator, monte, o2, p0420, performance, rear, secondary, wideband

Cat removal O2 & wideband location?

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Multi-page thread

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Ace25 on Dec 27, 2012

Jan 10, 2013 11:32 AM
by Ace25

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10

7,754

Engine/Transmission/Performance Adders

2002, 34, car, carlo, changed, code, coolant, gasket, head, ls, mc, monte, oil, p0128, p0420

2002 MC ls auto 3.4 p codes

ladagosta on Aug 24, 2012

Aug 24, 2012 09:45 AM
by ladagosta

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2

1,138

Monte Carlo Repair Help

01, 02, 98, carlo, check, chevy, code, engine, light, monte, montecarlo, p0420, po420, powered, ss, vbulletin

Check Engine P0420 Code

MonteMan92 on Jan 4, 2012

Jan 5, 2012 12:13 PM
by MonteMan92

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6

6,560

Monte Carlo Repair Help

02, 2000, 2001, 2001monte, 2003, 350, carlo, chevy, code, monte, montecarlo, p0420, p420, problem, ss

P0420 CEL 2001 Monte Carlo SS

NovaSS369 on Nov 13, 2011

Nov 14, 2011 02:16 PM
by NovaSS369

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8

7,954

Headers/Intake/Exhaust

2004, 3800, 4000, carlo, cat, chevrolet, chevy, code, misses, monte, p0300, p0420, pending, rough, rpm, runs, ss

2 Attachment(s)

Is it the Cat?

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Multi-page thread

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mairj40 on Jun 28, 2011

Jul 31, 2011 02:04 AM
by mairj40

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40

6,457

Headers/Intake/Exhaust

05, 2000, carlo, cel, check, codes, engine, hptuner, light, lights, monte, obd2, p0420, reset, tuner, turn

Help!!!!!!!!!! How do I get my check engine light off?

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Multi-page thread

1 2 3)

tlip06 on Feb 13, 2008

Jul 25, 2011 10:58 AM
by ChibiBlackSheep

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23

42,229

Engine/Transmission/Performance Adders

0440, 2000, 3800, carlo, cat, code, evap, filler, grand, monte, neck, p0420, p0440, scanner, series, snap, ss

P0440 5th cat converter options?

jarenzo on Jul 6, 2011

Jul 7, 2011 10:10 PM
by The_Maniac

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6

3,784

Monte Carlo Repair Help

2003, 23405, antifouler, carlo, cat, converter, coverter, magnaflow, monte, p0420, plug, spark, ss, throwing, trick

Time for a New Cat

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Multi-page thread

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03SSLE on Jun 22, 2011

Jun 22, 2011 06:43 PM
by ChibiBlackSheep

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11

2,488

Headers/Intake/Exhaust

0420, 1998, 2000, 2002, 2003, 38, 3800, 38l, camaro, carlo, code, fix, limiter, monte, p0420, pcm, reflash, rev, ss

3.8L questions

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Multi-page thread

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garshev on Jun 19, 2011

Jun 21, 2011 02:37 PM
by ChibiBlackSheep

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16

2,513

Engine/Transmission/Performance Adders

Unhappy

31how, 97, cam, car, carlo, change, code, grand, monte, p0420, po420, pontiac, position, prix, rid, sensor, sluggish

5th Gen, 97 LS 3.1L sluggish on gas. Has PO420 and others

shineman08 on Apr 22, 2011

Apr 26, 2011 08:18 AM
by bigcat24

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2

2,512

Monte Carlo Repair Help

02, 1997, 97, cap, carlo, chevrolet, chevy, codes, gas, located, location, monte, o2, p0420, sensor, sensors

1997 Monte Carlo p0420 code.

TheFrayed on Oct 21, 2010

Nov 13, 2010 04:55 AM
by skylark65

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6

3,404

Headers/Intake/Exhaust

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