What does the service code P0420 mean

Asked by Dec 26, 2015 at 04:07 PM about the 2010 GMC Terrain SLE1 AWD

Question type: Maintenance & Repair

3 Answers

94,815

Go to: http://www.obd-codes.com/p0420 There is a lot of info on your code and the causes and repair. HTH

3 of 3 people found this helpful.
235

Its either te o2 sensor or the catalytic converter

2 of 2 people found this helpful.
67,255

Visit your local GMC Dealer. Unless you have over 80,000 miles on your Terrain you may be covered by the new vehicle emission control warranty. A P0420 is either going to be the downstream oxygen sensor or the catalytic converter. My experience with this code is it's going to be the catalytic converter. So check with your dealer first. HTH. -Jim

1 of 1 people found this helpful.

Your Answer

Add photo

Related Questions

Terrain

Looking for a Used Terrain in your area?

CarGurus has 31,353 nationwide Terrain listings starting at $4,450.

ZIP:

Search GMC Terrain Questions

GMC Terrain Experts

#1 Richard Schroer
Richard Schroer
Reputation 3,730
#2 John Carson
John Carson
Reputation 770
#3 dandyoun
dandyoun
Reputation 390
View All

Related Models For Sale

Used GMC Acadia
527 Great Deals out of 46,451 listings starting at $2,000
Used Chevrolet Equinox
1,066 Great Deals out of 78,357 listings starting at $1,999
Used Ford Explorer
928 Great Deals out of 70,251 listings starting at $997
Used Jeep Grand Cherokee
1,024 Great Deals out of 72,253 listings starting at $700
Used Chevrolet Traverse
575 Great Deals out of 45,810 listings starting at $3,988
Used Ford Edge
709 Great Deals out of 50,209 listings starting at $1,933
Used GMC Yukon
382 Great Deals out of 19,299 listings starting at $2,000
Used Chevrolet Tahoe
559 Great Deals out of 31,371 listings starting at $1,500
Used Ford Escape
1,431 Great Deals out of 90,837 listings starting at $900
Used Honda CR-V
920 Great Deals out of 59,355 listings starting at $1,990
Used GMC Sierra 1500
761 Great Deals out of 69,125 listings starting at $1,850
Used Buick Enclave
387 Great Deals out of 32,197 listings starting at $4,988
Used Dodge Durango
268 Great Deals out of 21,293 listings starting at $1,499
Used Kia Sorento
453 Great Deals out of 29,091 listings starting at $1,500

Used Cars For Sale

2017 GMC Terrain SLE1 AWD For Sale
14 Great Deals out of 1,544 listings starting at $20,912
2016 GMC Terrain SLE1 AWD For Sale
126 listings starting at $17,695
2015 GMC Terrain SLE1 AWD For Sale
13 Great Deals out of 225 listings starting at $11,990
2014 GMC Terrain SLE1 AWD For Sale
10 Great Deals out of 323 listings starting at $11,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.