OBD-II Trouble Code Description for P0153 Subaru

O2 Sensor Circuit Slow Response

What does this mean?

OBD2 Code P0153 Subaru definition:
This involves the oxygen sensor upstream the catalytic converter on Bank 2. This code indicates the engine air fuel ratio is not being adjusted by the oxygen sensor signal or the ECM as expected to do so, or not adjusted as often as expected to do so once the engine is warmed or under normal engine use.

Symptoms

Possible sumptoms of OBD code P0153 Subaru
You will likely not notice any drivability problems, although there may be symptoms.

Causes

Possible causes of OBD code P0153 Subaru
A code P0153 Subaru may mean that one or more of the following has happened: The oxygen sensor is faulty The wiring to the sensor is broken / frayed There is an exhaust leak

Possible Solutions

Things that may fix the problem include: Check and fix any exhaust leaks Check for wiring problems (shorted, frayed wires) Check the frequency and amplitude of the oxygen sensor (advanced) Check for a deteriorating / contaminated oxygen sensor, replace if necessary Check for inlet air leaks Check the MAF sensor for proper operation Replace the Bank 2 oxygen sensor upstream of the catalytic converter