Technical Definition:

O2 Circuit Slow Response (Bank 2, Sensor 1)

Technical Description:

Possible Causes:

• The oxygen sensor is faulty
• The wiring to the sensor is broken / frayed
• There is an exhaust leak

Possible Symptoms:

O2 Sensor Circuit Slow Response Bank 2 Sensor 1

Possible Solutions:

• 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

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Front Heated Oxygen Sensor Bank 2
– Front Heated Oxygen Sensor Bank 2 harness is open or shorted
– Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection
– Inappropriate fuel pressure
– Faulty fuel injectors
– Intake air leaks
– Exhaust gas leaks

Specific Makes:

– Possible higher than usual fuel consumption