dbronson Posted October 19, 2018 Report Share Posted October 19, 2018 I m getting a po138 code on my 2009 3.5 and I have swapped the o2 sensor but no change. I do not hear any exhaust leak or vacuum leaks. What else should I check or look for? Quote Link to comment Share on other sites More sharing options...
jkeaton Posted October 21, 2018 Report Share Posted October 21, 2018 (edited) Next would be to check the connector and wiring. Converter could also be going bad. Edited October 21, 2018 by jkeaton Quote Link to comment Share on other sites More sharing options...
dbronson Posted October 22, 2018 Author Report Share Posted October 22, 2018 Thank you! I will double check the connector. Just look for bad wires? Is there a way to determine if the converter is going bad? Quote Link to comment Share on other sites More sharing options...
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