# Toyota tacoma 96 OBD2 trouble code

**URL:** <https://community.cartalk.com/t/toyota-tacoma-96-obd2-trouble-code/26318>\
**Category:** Maintenance/Repairs\
**Tags:** tacoma, toyota\
**Created:** [February 11, 2009, 1:25am UTC](https://community.cartalk.com/t/toyota-tacoma-96-obd2-trouble-code/26318 "2009-02-11T01:25:39Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![tugsme](https://avatars.discourse-cdn.com/v4/letter/t/d9b06d/32.png) [@tugsme](https://community.cartalk.com/u/tugsme)\
**Post date:** [February 11, 2009, 1:25am UTC](https://community.cartalk.com/t/toyota-tacoma-96-obd2-trouble-code/26318/1 "2009-02-11T01:25:39Z")

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I got a a trouble code of PO 420 which I can find in my chiltons book no problem there. The issue is I work on systems on tugboats and first thing you do is clear it and see if it comes up again. I did that on my truck and now I am worried that i cleared it and now it wont come up. If it is an actual issue should it come back up if cleared?

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**Author:** ![cigroller](https://avatars.discourse-cdn.com/v4/letter/c/c68b51/32.png) [@cigroller](https://community.cartalk.com/u/cigroller)\
**Post date:** [February 11, 2009, 1:35am UTC](https://community.cartalk.com/t/toyota-tacoma-96-obd2-trouble-code/26318/2 "2009-02-11T01:35:19Z")

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Yes, it will come back if the condition that created to start with is still present. I would not worry about it, but I would take a good look at my O2 sensors (at least inspect wiring) and check for exhaust leaks. Other than that I’d tool along happily until the dreaded light returns.