Jump to content
CaddyInfo Cadillac Forum

How to fix PO420 code (Cadillac)


Recommended Posts

Here we are replacing our (bank 1 sensor 2) downstream O2 sensor which has prevented the PO420 code from returning. The code would trigger within 5 minutes of the car idling and although the car still ran great before replacing the sensor it is nice to no longer have that CEL.

Bruce

2016 Cadillac ATS-V gray/black

Follow me on: Twitter Instagram Youtube

Link to comment
Share on other sites


Be careful spraying penetrating oil above yourself while lying under the car so you  don't get blow-back in your eyes.

Bruce

2016 Cadillac ATS-V gray/black

Follow me on: Twitter Instagram Youtube

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...