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Code P0420?

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Old 06-30-2014, 04:24 PM
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Came back on after 175 miles. I will take it to the dealership and see if it is the cats.
Old 07-09-2014, 04:04 AM
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Sent it to the dealership. They are replacing the cats under warranty. I asked about poisoning but the said there was none. We will see how it goes.
Old 07-19-2014, 09:14 AM
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Any update? Did you happen to get a blinking engine light or surge in the power when accelerating?
Old 07-25-2014, 07:46 AM
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hows your jeep running and did it cost anything at all? I have the same issue....
Old 07-25-2014, 11:49 AM
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I did not experience any blinking lights or stalling in the engine. No rotten egg smell, no smoke, no sluggishness. Just the light that was tormenting me.

I took it to the dealership and they replaced the cats. I asked if they were poisoned because I was worried about a larger problem. They told me it was not poisoned and they had just failed.

Replaced under warranty at no cost to me. Very satisfied with my experience.
Old 07-29-2014, 11:20 PM
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Default O2 Sensor on a 2011 Jeep Wrangler Unli-Rubicon

I'm having the same DTC P0420 on my 2011 JK Wrangler UR. Do you know where to purchase the MOPAR O2 sensor? Thanks!
Old 07-30-2014, 11:40 AM
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Originally Posted by Steelvise
I'm having the same DTC P0420 on my 2011 JK Wrangler UR. Do you know where to purchase the MOPAR O2 sensor? Thanks!
Online or the dealer parts department would be your best bet. You do know your sensors are covered under your emissions warranty though right?



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