Technical Definition:

Oxygen (O2) Sensor Signal Biased / Stuck Lean (Bank 1 – Sensor 1)

Technical Description:

Possible Causes:

Possible Symptoms:

O2 Sensor Signal Stuck Lean Bank 1 Sensor 1

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Front Heated Oxygen Sensor Bank 1
– Front Heated Oxygen Sensor Bank 1 harness is open or shorted
– Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection
– Inappropriate fuel pressure
– Faulty fuel injectors
– Intake air leaks may be faulty
– Vacuums leaks

Specific Makes:

– Excessive Fuel Consumption