P0158 - O2 Sensor Circuit High Voltage Bank 2 Sensor 2

Repair Importance Level: 2/3
Repair Difficulty Level: 2/3  What does this mean?
Possible causes
- Faulty Rear Heated Oxygen Sensor Bank 2
- Rear Heated Oxygen Sensor Bank 2 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks
- Exhaust gas leaks
  What does this mean?
Tech notes
Replacing the Rear Heated Oxygen Sensor Bank 2 usually takes care of the problem.
  What does this mean?
When is the code detected?
The P0158 code is set when the Engine Control Module (ECM) detects that the rear O2 sensor signal voltage remains excessively high for an extended period of time.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Possible higher than usual fuel consumption
P0158 Description

The heated oxygen sensor 2 (HO2S), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. For optimum catalyst operation, the air fuel mixture (air-fuel ratio) must be maintained near the ideal stoichiometric ratio. The HO2S output voltage changes suddenly in the vicinity of the stoichiometric ratio. The Engine Control Module (ECM) adjusts the fuel injection time so that the air-fuel ratio is nearly stoichiometric. The HO2S generates a voltage between 0.1 and 0.9 V in response to oxygen in the exhaust gas. If the oxygen in the exhaust gas increases, the air-fuel ratio becomes Lean. The ECM interprets Lean when the HO2S voltage is below 0.45 V. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. The ECM interprets Rich when the HO2S voltage is above 0.45 V.

OBDII Code P0158 - O2 Sensor Circuit High Voltage Bank 2 Sensor 2 - AutoCodes.com
P0158 Information for specific makes
P0158 ACURA O2 Sensor Circuit High Voltage Bank 2 Sensor 2   
P0158 AUDI HO2S22 Sensor Circuit High Voltage   
P0158 BMW O2 Sensor Circuit High Voltage Bank 2 Sensor 2   
P0158 BUICK HO2S Circuit High Voltage Bank 2 Sensor 2   
P0158 CADILLAC HO2S Circuit High Voltage Bank 2 Sensor 2   
P0158 CHEVROLET HO2S Circuit High Voltage Bank 2 Sensor 2   
P0158 CHRYSLER O2 Sensor 2/2 Circuit High   
P0158 DODGE O2 Sensor 2/2 Circuit High   
P0158 FORD O2 Sensor Circuit High Voltage Bank 2 Sensor 2   
P0158 GMC HO2S Circuit High Voltage Bank 2 Sensor 2   
P0158 HONDA O2 Sensor Circuit High Voltage Bank 2 Sensor 2   
P0158 HYUNDAI HO2S Circuit High Voltage Bank 2 Sensor 2   
P0158 INFINITI HO2S22 Circuit High Voltage   
P0158 JAGUAR O2 Sensor Circuit High Voltage Bank 2 Sensor 2   
P0158 JEEP O2 Sensor 2/2 Circuit High   
P0158 KIA HO2S21 Circuit High Voltage   
P0158 LEXUS HO2S22 Circuit High Voltage   
P0158 MAZDA HO2S LR Circuit High Input   
P0158 MERCEDES-BENZ O2 Sensor Circuit High Voltage Bank 2 Sensor 2
P0158 MINI O2 Sensor Circuit High Voltage Bank 2 Sensor 2   
P0158 MITSUBISHI Cylinder 2-3 Heated Oxygen Rear Sensor Circuit High Voltage   
P0158 NISSAN HO2S22 Circuit High Voltage   
P0158 PONTIAC HO2S Circuit High Voltage Bank 2 Sensor 2   
P0158 SATURN HO2S Circuit High Voltage Bank 2 Sensor 2   
P0158 SCION HO2S22 Circuit High Voltage   
P0158 SUBARU HO2S22 Circuit High Voltage   
P0158 TOYOTA HO2S22 Circuit High Voltage   
P0158 VOLKSWAGEN HO2S22 Sensor Circuit High Voltage   
Related Information
Repair Importance Level: 2
 
1=Low 2=Medium 3=High  
Repair Difficulty Level: 2
 
1=Easy 2=Moderate 3=Hard  
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