Catalytic converter

Tiny
CHUYARM
  • 2006 HUMMER H3
  • 120,000 MILES

I have a 2006 hummer h3 with about 139000 miles it hasnt been giving me any problems for months but check engine light wont turn off after I reset it, I was told by dealer that I need catalytic converter replaced ive replaced yhe sensor on manifold cat, the one that you reach from the top through engine there is total of three, one more below on manifold cat and one after other cat under car between cat and muffler, they gave me same scan code autozone gave me (p0420 low effic bank 1) should I replace other sensor or rplace bottom cata conv

Do you
have the same problem?
Yes
No
Saturday, August 20th, 2011 AT 7:04 PM

2 Replies

Tiny
RASMATAZ
  • MEMBER

Go to this link:http://www.obd-codes.com/p0420

Was this
answer
helpful?
Yes
No
Saturday, August 20th, 2011 AT 7:07 PM
Tiny
RASMATAZ
  • MEMBER

Depends what bank and sensor involved-Could be the oxygen sensor or the catalytic converter, sparkplug wire or valve that's causing the unburned fuel or overly rich air/fuel mixture, etc-

Was this
answer
helpful?
Yes
No
+1
Sunday, August 21st, 2011 AT 1:33 AM

Please login or register to post a reply.

Other Catalytic Converter Replace/Remove Questions