GMC P CODES (POWERTRAIN) P0400 - P0499 P0420

Found 5 results

Code PO420, Emission System?

Po420 Code, Check Engine Light Came On A Week Ago. I Put A Bottle Of Cataclean And Seemed To Help. No Check Engine Light For About A Week....

Asked by badboyrod ·

11 ANSWERS

14 IMAGES

2020

Is it Safe to Drive Check Engine Light?

VIDEO

Is it Safe to Drive Check Engine Light?

Instructional repair video

Check Engine Light

Check Engine Light

Why is my check engine or service engine soon turned on? In this guide we talk about what this is associated with this notorious light, what it is used for and what you...

Error Code P0420

My Vehicle Feels Like It Is Stuck At 3,000 Rpm's And 40 Mph And When I Push Harder On Acceleration Pedal It Will Slowly Climb Past 3000...

Asked by Johnjrangel ·

2 ANSWERS

3 IMAGES

2009

1999 GMC Yukon Code P0420

What Oxygen Sensor Is Having The Problem

Asked by barberman ·

1 ANSWER

1999

1999 GMC Sierra Diag Code P0420

I Used My Programmer To Get Code P0420 And So I Took It To A Midas To Have Them Take A Look. The Guy Told Me That I Needed To Replace My...

Asked by skelix912 ·

1 ANSWER

1999

How to Read Trouble Codes

VIDEO

How to Read Trouble Codes

Instructional repair video

P0420

I Have A 2001 Gmc Sonoma 2wd 2.2 Liter And Have The P0420 Code For Catylyst Efficiency Low Bank One. I Have A New Cat And Rear O2 Sensor So...

Asked by tallman1781 ·

1 ANSWER

2001

Ask a new GMC question

Sponsored links

Ask a Car Question. It's Free!

SPONSORED LINKS

Online car repair manuals

Online car repair manuals

© 1999 - 2024 2CarPros, Inc.