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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?

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Multi-page thread

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Frosty LS1 on 08-07-2009

09-08-2023 11:29 PM
by bumpin96monte

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10

4,860

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 07-17-2011

03-16-2023 11:58 AM
by The_Maniac

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13

12,058

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 09-24-2014

02-11-2015 07:47 AM
by michelob

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19

11,527

Monte Carlo Repair Help

Talking

inspection, nj, p0420

1 Attachment(s)

Finally Passed Inspection!

Dubstepticon on 10-14-2013

10-21-2013 10:36 AM
by ChibiBlackSheep

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5

1,140

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 12-03-2012

10-06-2013 07:10 PM
by xxtheshockerxx

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47

6,055

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 06-28-2006

07-01-2013 01:34 AM
by vazquezarnie

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10

32,673

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 06-07-2013

06-10-2013 05:30 AM
by ChibiBlackSheep

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8

6,250

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 02-20-2013

02-23-2013 03:52 PM
by 02CHEVYMONTESS

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33

13,368

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 02-05-2013

02-07-2013 10:05 PM
by The_Maniac

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6

10,170

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 12-27-2012

01-10-2013 11:32 AM
by Ace25

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10

6,967

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 08-24-2012

08-24-2012 09:45 AM
by ladagosta

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2

862

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 01-04-2012

01-05-2012 12:13 PM
by MonteMan92

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6

5,990

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 11-13-2011

11-14-2011 02:16 PM
by NovaSS369

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8

7,679

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 06-28-2011

07-31-2011 02:04 AM
by mairj40

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40

5,379

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 02-13-2008

07-25-2011 10:58 AM
by ChibiBlackSheep

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23

40,213

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 07-06-2011

07-07-2011 10:10 PM
by The_Maniac

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6

3,053

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 06-22-2011

06-22-2011 06:43 PM
by ChibiBlackSheep

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11

1,871

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

1 2)

garshev on 06-19-2011

06-21-2011 02:37 PM
by ChibiBlackSheep

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16

1,819

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 04-22-2011

04-26-2011 08:18 AM
by bigcat24

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2

2,241

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 10-21-2010

11-13-2010 04:55 AM
by skylark65

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6

3,307

Headers/Intake/Exhaust

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