I GET CODE PO420 CATALYST SYSTEM EFFICIENCY ...

  • Tiny
  • Anonymous
  • 2003 Nissan Altima
  • 185,000 miles

I get code Po420 catalyst system efficiency below threshold bank 1

Thursday, November 29th, 2012 AT 8:54 AM

1 Answer

  • Tiny
  • caradiodoc
  • Expert
  • 24,889 posts

Replace the driver's side catalytic converter.

Was this
answer
helpful?
Yes
No
Thursday, November 29th, 2012 AT 9:14 AM

Please login or register to post a reply.

Similar Questions