DTC 16555
NOTE: If the diagnostic trouble code "P0171/16555" is set, the oxygen sensor control has exceeded the learning value limit in the "rich" direction, but the Heated Oxygen Sensor (HO2S) still recognizes "mixture too lean".
NOTE: If the diagnostic trouble code "P0171/16555" is set, the oxygen sensor control has exceeded the learning value limit in the "rich" direction, but the Heated Oxygen Sensor (HO2S) still recognizes "mixture too lean".