P2A01 FORD - Oxygen Sensor Circuit Range/Performance Bank 1 Sensor 2
Tech notesReplacing the rear O2 Sensor bank 1 usually takes care of the problem.
P2a01 Ford DescriptionThe Powertrain Control Module (PCM) monitors the Heated Oxygen Sensor (HO2S) for an out of range low voltage concern. The P2A01 code sets if the HO2S voltage is out of range low for a calibrated period of time.
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