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I have a 06 Ridgeline with this error code (P0135) for the past few months im finally getting around to fixing it. The check engine light went out after driving in deep water. Is it easy to fix this on my own and save money? what parts do i need and how do i fix it....if anyones done this before please help! Thank You!
 

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It looks like a failing O2 sensor.

Here's a generic video about O2 sensor replacement.


I replaced all 4 of my O2 sensors as a DIY operation few weeks ago.

Knowing my driving style (6 miles one way to work -- usually 3 stops with 3 cool downs/heat ups) may not be the best for extended O2 sensor life, I like to replace O2 sensors like spark plugs and other maintenance items. My O2 sensors never caused a CEL code but I knew mileage would improve by replacement.

In my case replacing lazy O2 sensors provided the following benefits.

1) Increased MPG - Mileage returned to the level where it was when the Ridgeline was nearly new.

2) Increased pep around town.

I would replace the upstream O2 sensors first.

Check out the following thread.

http://www.ridgelineownersclub.com/forums/showthread.php?t=62274

and the following post.

http://www.ridgelineownersclub.com/forums/showthread.php?t=66074&page=3

NOTE: Do not drop the new O2 sensor. The sensors are FRAGILE.
 

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http://engine-codes.com/p0135_honda.html

Replace the sensor if the fuses are ok.
If you replace it then do yourself a favor and use an OEM sensor. Or, at a bare minimum, use a good name brand sensor with the correct wiring and connector already installed. Far fewer issues that way.
And do it before the CAT is damaged.
 
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