Technical Definition:

O2 Circuit High Voltage (Bank 2, Sensor 3)

Technical Description:

Possible Causes:

• Bad O2 sensor (Bank 2 Sensor 3)
• Wiring in contact with exhaust components
• Engine running rich (If other codes are present)
• Holes in exhaust near Bank 2 Sensor 3
• Short to voltage on signal circuit
• Bad PCM

Possible Symptoms:

• MIL (Malfunction Indicator Lamp) on
• Engine loses power and misses intermittently
• May exhibit loss of fuel efficiency

O2 Sensor Circuit High Voltage Bank 2 Sensor 3

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Heated Oxygen Sensor Bank 2 Sensor 3
– Heated Oxygen Sensor Bank 2 Sensor 3 harness is open or shorted
– Heated Oxygen Sensor Bank 2 Sensor 3 circuit poor electrical connection

Specific Makes:

– High Fuel Consumption
– Excessive Smoke from Exhaust