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What is your question?
The vac and trac light and check engine light came on a few months ago, then went off. It returned a couple of days ago. it went on in cold weather both times (around 20-degrees F). Get codes C1201 and P0138. There was a Technical Service Bulletin for my VIN corolla to refresh the ECM (PCM) as a possible cure for the P0138 code (O2 sensor. What could cause the intermittent C1201 code?
How long has your 2010 Toyota Corolla had this problem?
few days
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