I assume this is also the 4.0L V6. I had this same issue on my 2007 FJ Cruiser following the replacementof my alternator. I wasted money on new catalytic converters and all new O2 sensors to no avail. That combination of dash lights and cat converter or o2 sensor code is a known issue (all over Toyota forums) with no fix, except possibly a new computer. I drove it for over 100k more miles with no issue, ran like a top.

This post was edited on 2/12/23 at 10:02 am

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Posted by LSUdoc71

Red Stick

Member since Oct 2012

344 posts

Posted on 2/12/23 at 10:37 am to Duwayne_street

Enadious: yes, Chabill's and my local repair guy. They both said that they (and most places) don't do this work, and to try AGCO or call around to find someone. I guess they are in the exhaust manifolds.

SpotCheckBilly: Yes, I have been living in MS for a few months while my house is being remodeled due to a water leak under the floors. It's past-due by a few months. What's the low-cost option, just disconnect the battery again and bring it in?

Duwayne: Yes, 4.0 V6. That's my fear, that it will not fix the underlying problem.

It's funny, same thing happened (all warning lights came on). Went to Price Leblanc for an assessment (yes I know, I know). They said both exhaust manifolds and some other shite would need to be changed, like 6K, and there was no guarantee that would even fix it. Haha. Ran a couple of cans of BG BK44 fuel system cleaner though it after reading about it helping some folks on the 4runner forums, and they all went off. That was like 4 years ago!

Geauxnc- never heard of a delete kit. Please elaborate...

Thanks everyone.