P0158 Infiniti Code - HO2S22 Circuit High Voltage
Quick Answer
The P0158 Infiniti code indicates a problem with the HO2S22 (Heated Oxygen Sensor 2 Bank 2) circuit showing high voltage. Common causes include Faulty HO2S22 sensor, Wiring issues in the sensor circuit, Vacuum leak. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P0158 Infiniti indicates HO2S22 Circuit High Voltage.
- Common causes
- Common causes include Faulty HO2S22 sensor, Wiring issues in the sensor circuit, Vacuum leak.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
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Code P0158 Infiniti Description
The P0158 Infiniti code indicates a problem with the HO2S22 (Heated Oxygen Sensor 2 Bank 2) circuit showing high voltage. The HO2S22 sensor is responsible for monitoring the oxygen levels in the exhaust gases and sending this information to the engine control module (ECM) to help adjust the air-fuel mixture for optimal combustion. When the sensor detects a high voltage signal, it means that there is an issue with the oxygen levels in the exhaust gases, which can lead to poor engine performance and increased emissions.
Common Causes of P0158 Infiniti
- Faulty HO2S22 sensor
- Wiring issues in the sensor circuit
- Vacuum leak
- Exhaust leaks
- Malfunctioning ECM
Symptoms of P0158 Infiniti
- Decreased fuel efficiency
- Rough idling
- Hesitation or stumbling during acceleration
- Engine stalling
- Increased emissions
How to Fix P0158 Infiniti
- Start by inspecting the HO2S22 sensor and its wiring for any visible damage or corrosion.
- Test the sensor using a multimeter to check for proper voltage output.
- If the sensor is faulty, replace it with a new one following the manufacturer's instructions.
- Check the wiring harness for any shorts or opens and repair as necessary.
- Clear the error code from the ECM and perform a test drive to ensure the issue has been resolved.
Cost to Fix P0158 Infiniti
The typical repair costs for resolving a P0158 Infiniti code can vary depending on the specific cause of the issue. In general, replacing a faulty HO2S22 sensor can cost between $100 to $200 for the part alone, with additional costs for labor. The total repair cost, including parts and labor, can range from $200 to $500 or more. It is advisable to consult with a professional mechanic for a more accurate estimate based on your vehicle's make and model, as well as the local labor rates. Keep in mind that diagnostic time and labor rates can vary, so it is essential to get multiple quotes before proceeding with the repair.
Tech Notes for P0158 Infiniti
When is the Code Detected?
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Information for Specific Infiniti Models
- P0158 2003 Infiniti G35 — HO2S22 Circuit High Voltage
- P0158 2004 Infiniti G35 — HO2S22 Circuit High Voltage
- P0158 2005 Infiniti G35 — HO2S22 Circuit High Voltage
- P0158 2006 Infiniti G35 — HO2S22 Circuit High Voltage
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