A possibility this code was there all along triggered by P1147 or P0138. You have cleared it and hopefully it won't return.
Thanks for the post. My SES light has been on about 3 wks. now and I'm looking for H02 sensor. My dtc is P0038 that also points to the post cat H02 sensor. I was thinking it just might be carbon up when I drove the car a few times before I could replace the dead ignition coil causing the misfire. Also will read up on the above 2 codes.
Is NGK/NTK the OE sensor?
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