P0420:catalytic converter or O2 sensor?

xinzhao · 07-19-2012, 03:23 AM

Code:P0420
If I drive crazily(not gently, for example, push hard the accelerator pedal), check engine light will off by itself after driving several miles.
So, the problem is the catalytic converter or O2 sensor? Which one should be replaced first?

sprtent · 07-19-2012, 12:59 PM

My money is on the cat. How many miles is your car?

If you have both P0410 and P0420, then I would replace the sensor first to see if it will get rid of the cat code as well. But I would love to hear what other more knowlegeable people have to say. I'm here to learn as well.

xinzhao · 07-19-2012, 10:09 PM

140K on my car. Just P0420. So I decided to replace cat at first.

Quote:

Originally Posted by sprtent

My money is on the cat. How many miles is your car?

If you have both P0410 and P0420, then I would replace the sensor first to see if it will get rid of the cat code as well. But I would love to hear what other more knowlegeable people have to say. I'm here to learn as well.

jasepb1120 · 07-21-2012, 12:03 AM

I had the P0420 code and called AcuraCare. warranty extended to 120K miles. They replaced the Cat. Problem solved

Sent from my SAMSUNG-SGH-I717 using AutoGuide.Com Free App

xinzhao · 07-22-2012, 04:33 AM

Unfortunately， mine is 132K

Quote:

Originally Posted by jasepb1120

I had the P0420 code and called AcuraCare. warranty extended to 120K miles. They replaced the Cat. Problem solved

Sent from my SAMSUNG-SGH-I717 using AutoGuide.Com Free App

TexasHonda · 07-22-2012, 08:34 AM

Check ebay for some decent prices, $150-$250, on bolt-in replacements.

good luck

mdxer12345 · 12-10-2012, 11:06 AM

do acura warranty cat converters on 2003 mdx's? anyone have a link?

07-19-2012, 03:23 AM	#1 (permalink)
xinzhao Registered User Join Date: Mar 2012 Posts: 13	P0420:catalytic converter or O2 sensor? Code:P0420 If I drive crazily(not gently, for example, push hard the accelerator pedal), check engine light will off by itself after driving several miles. So, the problem is the catalytic converter or O2 sensor? Which one should be replaced first?

07-19-2012, 12:59 PM	#2 (permalink)
sprtent Registered User Join Date: Nov 2010 Location: SF bay area Posts: 265	My money is on the cat. How many miles is your car? If you have both P0410 and P0420, then I would replace the sensor first to see if it will get rid of the cat code as well. But I would love to hear what other more knowlegeable people have to say. I'm here to learn as well. __________________ 10 Prius - commuter 07 MDX Sport/Entertainment - Aspen White Pearl w/ Parchment

07-22-2012, 08:34 AM	#6 (permalink)
TexasHonda Registered User Join Date: May 2010 Location: Katy, TX Posts: 353	Check ebay for some decent prices, $150-$250, on bolt-in replacements. good luck __________________ 2003 Acura MDX w/ Nav 2006 Acura TSX 2007 Honda Accord 1994 Honda Accord See you down the ROW!

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07-21-2012, 12:03 AM	#4 (permalink)
jasepb1120 Registered User Join Date: Apr 2012 Location: Enid, OK Posts: 2	I had the P0420 code and called AcuraCare. warranty extended to 120K miles. They replaced the Cat. Problem solved Sent from my SAMSUNG-SGH-I717 using AutoGuide.Com Free App

12-10-2012, 11:06 AM	#7 (permalink)
mdxer12345 Registered User Join Date: Nov 2012 Location: fairfax Posts: 10	do acura warranty cat converters on 2003 mdx's? anyone have a link?

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