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

90,545

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

3 out of 3 people think this is helpful.
235

Its either te o2 sensor or the catalytic converter

2 out of 2 people think this is helpful.
64,945

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 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Terrain

Looking for a Used Terrain in your area?

CarGurus has 32,398 nationwide Terrain listings starting at $5,999.

ZIP:

Search GMC Terrain Questions

GMC Terrain Experts

#1 Richard Schroer
Richard Schroer
Reputation 3,530
#2 John Carson
John Carson
Reputation 650
#3 dandyoun
dandyoun
Reputation 380
View All

Related Models For Sale

Used GMC Acadia
509 Great Deals out of 46,604 listings starting at $3,900
Used Chevrolet Equinox
1,008 Great Deals out of 63,885 listings starting at $1,995
Used Ford Explorer
811 Great Deals out of 74,885 listings starting at $750
Used Jeep Grand Cherokee
999 Great Deals out of 73,081 listings starting at $950
Used Chevrolet Traverse
484 Great Deals out of 47,141 listings starting at $5,500
Used GMC Yukon
362 Great Deals out of 17,031 listings starting at $2,500
Used Ford Edge
634 Great Deals out of 51,591 listings starting at $3,990
Used Chevrolet Tahoe
555 Great Deals out of 27,465 listings starting at $999
Used Ford Escape
1,294 Great Deals out of 95,361 listings starting at $1,400
Used GMC Sierra 1500
835 Great Deals out of 66,316 listings starting at $1,995
Used Honda CR-V
759 Great Deals out of 58,790 listings starting at $900
Used Buick Enclave
313 Great Deals out of 30,801 listings starting at $4,991
Used Kia Sorento
404 Great Deals out of 33,168 listings starting at $1,495
Used Nissan Rogue
558 Great Deals out of 78,229 listings starting at $3,302

Used Cars For Sale

2017 GMC Terrain SLE1 AWD For Sale
12 Great Deals out of 1,607 listings starting at $21,900
2016 GMC Terrain SLE1 AWD For Sale
4 Great Deals out of 128 listings starting at $18,500
2015 GMC Terrain SLE1 AWD For Sale
9 Great Deals out of 269 listings starting at $13,999
2014 GMC Terrain SLE1 AWD For Sale
16 Great Deals out of 306 listings starting at $9,950