Not worth the weeks wait, I'm afraid.
When something automotive is beyond Number_Cruncher's meagre knowledge, I should know better than expect a result from the database for a generic code reader: Code 1651 not known.
P1651
Sorry, we do not yet have the definition for P1651 for LEXUS .
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Fault code
P0172
Manufacturer
LEXUS
Bank 2 Sensor 2 O2 Sensor Heater Circuit Malfunction
Probable causes
Wiring, Heated Oxygen Sensor (HO2S), ECM
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