Code P0420

2004 CHEVROLET TRACKER
214,000 MILES • 4 CYL • 4WD • AUTOMATIC
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CKMARTI61
  • MEMBER
  • 2 POSTS
I took my son's car to O'Riellys for a diagnostic because the check engine came on and one of the codes that came up was P0420. Is that the catalytic converter or the O2 sensor? Thanks
Mar 7, 2020 at 5:26 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Good afternoon.

This is a code for the catalytic converter itself. The internals are worn out and it needs to be replaced.

Roy
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Mar 7, 2020 at 5:35 AM
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CKMARTI61
  • MEMBER
  • 2 POSTS
Thanks! I'll let my son know.
Mar 7, 2020 at 5:44 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
You are welcome.

Always glad to help.

Roy
Mar 7, 2020 at 5:46 AM
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