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1998 Volvo V70 catalytic converter

Tiny
YLLAS
  • MEMBER
  • 1998 VOLVO V70
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 122,000 MILES
I insatalled a new catalytic converter and about after six months I am receiving po code 422. Does this mean the cat is bad?
Friday, November 27th, 2009 AT 11:25 AM

2 Replies

Tiny
MERLIN2021
  • MECHANIC
  • 17,250 POSTS
Either that or the downstream 02 sensor is switching too much, could be a bad sensor.


http://www.2carpros.com/forum/automotive_pictures/62217_P0430b_High_2.jpg



http://www.2carpros.com/forum/automotive_pictures/62217_P0430a_2.jpg


Top image shown normal efficency, bottom is low efficency. This can be seen with scantool set to read live data from the 02 sensors. Today's sensors are designed for 100,000 miles of service, you are over that, a fresh set of 02's might be needed anyway!
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Friday, November 27th, 2009 AT 12:13 PM
Tiny
JIS001
  • MECHANIC
  • 3,408 POSTS
If you installed an aftermarket cat did they install an OBD2 catalytic converter?
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Friday, November 27th, 2009 AT 8:00 PM

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