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2003 Honda Civic OBD2 code P1490

Tiny
TECHLEAD
  • MEMBER
  • 2003 HONDA CIVIC
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 175,000 MILES
I have a 2003 Honda Civic HX. OBD code P1490 comes up when I access my PCM. I'm told that has to do with my catalytic converter however I have two on this car. Can I as a DIYer diagnose which cat is giving me problems or do I need to see a profesional? If I can diagnose this myself how do I do that?
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Wednesday, February 25th, 2009 AT 10:30 AM

3 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Hi techlead,

Are you sure the code is correct? The code mentioned is not found in the DTC list.
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Wednesday, February 25th, 2009 AT 1:16 PM
Tiny
TECHLEAD
  • MEMBER
  • 2 POSTS
My bad, the code is P1420. I was referring to memory when I wrote that. I guess my memory is not as good as I thought it was.
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Wednesday, February 25th, 2009 AT 5:26 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Hi,

Attached are the testing procedures for the DTC.


https://www.2carpros.com/forum/automotive_pictures/192750_P1420DTC03Civic_1.jpg

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Thursday, February 26th, 2009 AT 7:05 AM

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