2007 Toyota Corolla Q&A

2007 Toyota Corolla Question: Check engine light came on (code P0138) but disappeared a day later.

Few months ago due to recall and check engine light the ECM control was replaced by the dealership. Two days ago check engine light came on; when checked it showed the code P0138 but the light disappeared a day later. Please help me with this. -
Answer 1
Take it back to the dealership and tell them about the problem, maybe the computer-re-flash did not go well. -
Answer 2
for this code, you can try this Replace O2 sensor. Repair short to battery voltage in o2 sensor signal circuit. -
Answer 3
Hello i would go back to the dealer right away and have them recheck the recall work performed and the re-programing of the computer.HAVE A BLESS DAY from DR.RECO. -
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Few months ago due to recall and check engine light the Toyota dealership changed the ECM control for my car. Two days ago I had the engine light back on. I checked and found the code P0138 but it...