Search:

Tag: p0420

Page 1 of 2 1 2

Search: Search took 0.00 seconds.

  1. Pontiac GP 08 - P0300 & P0420

    Started by sn95gt50, 02-06-2020 04:01 PM
    cel, code, p0300, p0420, pulled
    • Replies: 16
    • Views: 4,984
    Last Post: 02-09-2020 07:34 PM
    by sn95gt50  Go to last post

    Forum:
    04+ Specifics

  2. Need help with 0420 and 0128 code!!

    Started by mcdavidhome, 10-29-2019 11:48 PM
    code, data, p0128, p0420, sensors
    • Replies: 12
    • Views: 13,191
    Last Post: 11-25-2019 12:28 PM
    by mcdavidhome  Go to last post

    Forum:
    General Tech Discussion

  3. Anyone in the Northern VA area? I need some codes removed

    Started by TStierley, 12-09-2015 07:50 PM
    delete codes, northern va, p0420, pcm, virginia
    • Replies: 15
    • Views: 2,642
    Last Post: 01-04-2016 06:48 AM
    by TStierley  Go to last post

    Forum:
    PCM Tuning

  4. P0230 2005 GP 3800 Please help!!!

    Started by ssuttle1, 06-11-2015 09:58 PM
    crankshaft sensor, fuel pump no start, p0230, p0420, theft deterrent system
    • Replies: 11
    • Views: 4,073
    Last Post: 06-21-2015 09:01 AM
    by Scottydoggs  Go to last post

    Forum:
    3.8L V6 Naturally Aspirated (L36)(L26)

  5. Car Threw A P0420 Code

    Started by iowagrandprix, 11-17-2014 06:37 PM
    catalyst system, catalytic converter, efficiency, p0420, spark plugs
    • Replies: 18
    • Views: 7,916
    Last Post: 12-12-2014 05:49 PM
    by HighOctaneRacing  Go to last post

    Forum:
    3.8L V6 Naturally Aspirated (L36)(L26)

  6. Replacing bad cat, bolt question

    Started by yekimmrt, 01-10-2014 03:06 PM
    catalytic converter, exhaust bolts, p0420
    • Replies: 3
    • Views: 906
    Last Post: 01-11-2014 12:38 AM
    by Twizted 1  Go to last post

    Forum:
    General Tech Discussion

  7. Intense PCM

    Started by tbrown1309, 12-29-2013 01:24 AM
    p0420, pcm, tuning
    • Replies: 4
    • Views: 1,931
    Last Post: 12-29-2013 12:48 PM
    by chris99gtp  Go to last post

    Forum:
    General Grand Prix Discussion

  8. P0420 just popped

    Started by Fahrenheit, 09-15-2013 11:41 PM
    p0420, popped
    • Replies: 1
    • Views: 914
    Last Post: 09-15-2013 11:46 PM
    by Scottydoggs  Go to last post

    Forum:
    General Grand Prix Discussion

  9. p0420

    Started by sirricealot, 04-18-2013 10:59 AM
    3 Pages •
    1 2 3
    p0420
    • Replies: 40
    • Views: 3,677
    Last Post: 09-09-2013 04:13 PM
    by jjmitch87  Go to last post

    Forum:
    General Tech Discussion

  10. 2004 GTP Code P0420

    Started by Gohan77, 08-30-2013 04:53 PM
    2004, code, gtp, p0420
    • Replies: 1
    • Views: 1,885
    Last Post: 08-30-2013 05:01 PM
    by REDCRAPGP  Go to last post

    Forum:
    General Tech Discussion

  11. How to get around P0420 code?

    Started by dmahlikGT, 08-28-2013 03:14 PM
    code, p0420
    • Replies: 9
    • Views: 2,594
    Last Post: 08-29-2013 12:43 PM
    by dmahlikGT  Go to last post

    Forum:
    PCM Tuning

  12. p0420

    Started by sirricealot, 04-18-2013 10:39 AM
    p0420
    • Replies: 6
    • Views: 1,599
    Last Post: 04-25-2013 10:20 AM
    by Neil98gt  Go to last post

    Forum:
    5.3L V8 (LS4)

  13. 2004 GTP with P0420

    Started by mckillin, 02-21-2013 12:36 PM
    2004, gtp, p0420
    • Replies: 0
    • Views: 871
    Last Post: 02-21-2013 12:36 PM
    by mckillin  Go to last post

    Forum:
    3.8L V6 Supercharged (L67)(L32)

  14. p0420 and now p0054

    Started by Matticus, 12-12-2012 08:22 PM
    p0054, p0420
    • Replies: 6
    • Views: 3,144
    Last Post: 12-13-2012 09:57 AM
    by BillBoost37  Go to last post

    Forum:
    General Tech Discussion

  15. 2004 Grand Prix GT - P0420 - Video of Symptoms

    Started by 04PrixxGT, 11-12-2012 04:33 PM
    2 Pages •
    1 2
    2004, grand, p0420, prix, symptoms, video
    • Replies: 21
    • Views: 3,645
    Last Post: 11-24-2012 11:00 PM
    by mskram1  Go to last post

    Forum:
    3.8L V6 Naturally Aspirated (L36)(L26)

  16. Hello and help please...

    Started by bdawg, 02-14-2012 02:06 PM
    '98 gtp, p0301, p0336, p0420
    • Replies: 5
    • Views: 1,430
    Last Post: 11-20-2012 07:17 PM
    by JerzNick  Go to last post

    Forum:
    3.8L V6 Supercharged (L67)(L32)

  17. Persistent P0420. Please help--about to hock my 05 Prix for scrap I'm so mad.

    Started by Basher, 11-02-2012 09:31 PM
    2 Pages •
    1 2
    helpabout, hock, mad, p0420, p0420 2005, persistent, prix, scrap
    • Replies: 26
    • Views: 5,631
    Last Post: 11-14-2012 08:44 PM
    by Chainsaw6966  Go to last post

    Forum:
    3.8L V6 Naturally Aspirated (L36)(L26)

  18. P0420 code

    Started by parsonsl1, 10-29-2012 04:03 PM
    code, p0420, p0420 code, ses code
    • Replies: 5
    • Views: 1,673
    Last Post: 11-01-2012 09:53 AM
    by GMCustomerService  Go to last post

    Forum:
    Introductions/Noob Questions

  19. P0420 code

    Started by BChimo, 02-26-2009 11:54 PM
    code, p0420
    • Replies: 8
    • Views: 5,816
    Last Post: 10-18-2012 12:18 PM
    by Slick2500  Go to last post

    Forum:
    General Tech Discussion

  20. p0420 engine code

    Started by gearjammer79, 10-08-2012 02:59 PM
    code, engine, p0420
    • Replies: 5
    • Views: 1,802
    Last Post: 10-15-2012 05:14 AM
    by gpbastard  Go to last post

    Forum:
    General Grand Prix Discussion

  21. Two questions: Meth and knock? P0420 code?

    Started by jmackisback, 10-03-2012 03:31 PM
    code, knock, meth, p0420, questions
    • Replies: 6
    • Views: 1,346
    Last Post: 10-04-2012 07:59 AM
    by Bio248  Go to last post

    Forum:
    3.8L V6 Supercharged (L67)(L32)

  22. Up for debate p0420 code and bad gas mileage..

    Started by chevy350, 09-20-2012 08:42 PM
    bad, code, debate, gas, mileage, p0420
    • Replies: 13
    • Views: 1,914
    Last Post: 09-22-2012 12:23 PM
    by chevy350  Go to last post

    Forum:
    General Tech Discussion

  23. code p0420?

    Started by Jtg1551, 09-06-2012 12:01 PM
    code, p0420
    • Replies: 8
    • Views: 1,754
    Last Post: 09-07-2012 11:58 AM
    by blueguy  Go to last post

    Forum:
    General Grand Prix Discussion

  24. P0420 & P0136 Problem and How I fixed it

    Started by brised, 06-27-2012 11:35 AM
    fixed, p0136, p0420, problem
    • Replies: 3
    • Views: 3,072
    Last Post: 08-08-2012 01:24 AM
    by mtl  Go to last post

    Forum:
    General Grand Prix Discussion

  25. Check Engine Lights

    Started by BlackGT1, 04-12-2012 08:30 PM
    check, codes, engine, error, lights, p0420, p0440
    • Replies: 7
    • Views: 1,447
    Last Post: 04-15-2012 08:40 PM
    by BlackGT1  Go to last post

    Forum:
    General Tech Discussion

Results 1 to 25 of 45
Page 1 of 2 1 2