# 2009 RAV4-CEL on

**URL:** <https://community.cartalk.com/t/2009-rav4-cel-on/93399>\
**Category:** Maintenance/Repairs\
**Tags:** rav4, toyota\
**Created:** [May 28, 2016, 3:37am UTC](https://community.cartalk.com/t/2009-rav4-cel-on/93399 "2016-05-28T03:37:48Z")\
**Posts on this page:** 5\
**Page:** 2

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**Author:** ![MikeInNH](https://avatars.discourse-cdn.com/v4/letter/m/a587f6/32.png) [@MikeInNH](https://community.cartalk.com/u/MikeInNH)\
**Post date:** [June 4, 2016, 4:21am UTC](https://community.cartalk.com/t/2009-rav4-cel-on/93399/21 "2016-06-04T04:21:04Z")

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I’ve never ever had an O2 sensor fail on any vehicle even with well over 300k miles. I’ve also never seen a service interval for any vehicle I’ve ever own.

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**Author:** ![NYBo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nybo/32/17281_2.png) [@NYBo](https://community.cartalk.com/u/NYBo)\
**Post date:** [June 4, 2016, 6:31am UTC](https://community.cartalk.com/t/2009-rav4-cel-on/93399/22 "2016-06-04T06:31:33Z")

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I thought OBD II monitoring of O2 sensors was a lot more sensitive than OBD I so the sensor would trip the CEL before driveability became an issue.

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**Author:** ![Cole\_s\_Law](https://avatars.discourse-cdn.com/v4/letter/c/f17d59/32.png) [@Cole\_s\_Law](https://community.cartalk.com/u/Cole_s_Law)\
**Post date:** [June 5, 2016, 12:59am UTC](https://community.cartalk.com/t/2009-rav4-cel-on/93399/23 "2016-06-05T00:59:08Z")

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@NYBo, it must vary from manufacturer to manufacturer. On my old Jeep ('98, so OBDII), the sensor didn’t trip the CEL until I was stalling out at stoplights. (I made a lot of friends on the road that week…)

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**Author:** ![galant](https://avatars.discourse-cdn.com/v4/letter/g/77aa72/32.png) [@galant](https://community.cartalk.com/u/galant)\
**Post date:** [June 5, 2016, 1:32am UTC](https://community.cartalk.com/t/2009-rav4-cel-on/93399/24 "2016-06-05T01:32:39Z")

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I have never thought of pre-emptive Oxygen sensor change. The CEL to me is annoying as it is and never thought it would stay off despite a problem 😃

The only car I had that had a CEL because of an O2 sensor was a 95 Mitsubishi. Otherwise, I have driven them at least to 180K miles on the original O2 sensor (most of them were used cars but would imagine at bellow 60K miles the sensor was original).

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**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\
**Post date:** [June 5, 2016, 2:27am UTC](https://community.cartalk.com/t/2009-rav4-cel-on/93399/25 "2016-06-05T02:27:10Z")

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OBD2 does not always throw a code for a failed/failing sensor or component

I’ve replaced many bad crankshaft position sensors which never generated a code. Yet the vehicle would not start or stall, and very frequently, also

I’ve even replaced a few catalytic converters which were simply not effective enough to pass the tailpipe emissions test. yet no P0420 or P0430. Ever. No current code. No stored code. Not even a pending code. I’m not talking about WHY that cat was no good. Because that’s not really the point

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