DTC P0153: Front Air/Fuel Ratio (A/F) Sensor (Bank 2, Sensor 1) Malfunction/Slow Response: General Description

The front air/fuel ratio (A/F) sensor (bank 2, sensor 1) has a linear signal output in relation to the oxygen concentration. The powertrain control module (PCM) computes the air/fuel ratio from the front A/F sensor output voltage and uses fuel feedback control to improve exhaust emissions. The PCM compares the response characteristics against the front A/F sensor output. If the total A/F sensor output is a specified value for a specified time, the PCM detects a deteriorated response and stores a DTC.