Just got back from a 600 mile off-road trip. Check engine light came on half way through. P0138. Replaced my O2 sensors less than 5,000 miles ago with the NGK/NTK brand. Doing some quick browsing around the forum, thinking it might be time to replace the Cat. 230k miles on the original.
Is replacing the Cat the first logical step to remedy my CEL, or is there a less expensive place to look first?
If I do need to replace the Cat, any particular brands I should look at? Should I replace everything from the exhaust back at the same time? Any other advice?
Thanks
Is replacing the Cat the first logical step to remedy my CEL, or is there a less expensive place to look first?
If I do need to replace the Cat, any particular brands I should look at? Should I replace everything from the exhaust back at the same time? Any other advice?
Thanks
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