Technical Definition:

Heated Oxygen Sensor (HO2S) Heater Control Circuit High (Bank 2 – Sensor 2)

Technical Description:

Possible Causes:

• Faulty Bank 2,2 HO2S (Heated Oxygen sensor)
• Open in the heater control circuit (12 volt PCM controlled systems)
• Short to B+ (battery voltage) in the heater control circuit (12 volt PCM controlled systems)
• Open ground circuit (12 volt PCM controlled systems)
• Short to ground on heater control circuit (On PCM ground controlled systems

Possible Symptoms:

• MIL (Malfunction indicator lamp) illumination

HO2S Heater Control Circuit High Bank 2 Sensor 2

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2
– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2 harness is open shorted
– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2 circuit poor electrical connection
– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2 circuit fuse
– Faulty Engine Control Module (ECM)

Specific Makes: