SCANNED PCM FOR CODES (1 HISTORY CODE STORED) P0031 B1SI HEATER CONTROL CKT LOW TEST POWER AND GROUND TO AFR (OK) TEST AFR HEATER ELEMENT (WITHIN SPEC._ CHECKED FOR TSB'S FOR CODE (NONE AVAILABLE). Since CHECK ENGINE light corrected itself, I will return when it re-displays. This was a basic visit to address the check engine light on dash.
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