P0159 Infiniti Code - HO2S22 Slow Response
Quick Answer
The P0159 diagnostic trouble code for Infiniti vehicles indicates that the oxygen sensor located in bank 2 sensor 2 is experiencing a slow response. Common causes include Faulty oxygen sensor, Wiring or electrical issues, Exhaust system leaks. 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
- P0159 Infiniti indicates HO2S22 Slow Response.
- Common causes
- Common causes include Faulty oxygen sensor, Wiring or electrical issues, Exhaust system leaks.
- 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 P0159 Infiniti Description
The P0159 diagnostic trouble code for Infiniti vehicles indicates that the oxygen sensor located in bank 2 sensor 2 is experiencing a slow response. The oxygen sensor, also known as the HO2S (heated oxygen sensor), is a crucial component of the vehicle's emissions control system. It measures the oxygen levels in the exhaust gases and provides feedback to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion.
Common Causes of P0159 Infiniti
- Faulty oxygen sensor
- Wiring or electrical issues
- Exhaust system leaks
- Vacuum leaks
- Engine misfires
Symptoms of P0159 Infiniti
- Decreased fuel efficiency
- Rough idle or stalling
- Engine misfires
- Check engine light illuminated
- Failed emissions test
How to Fix P0159 Infiniti
- Diagnose the issue by using a scan tool to verify the P0159 code and inspect the oxygen sensor and related components.
- Replace the HO2S22 (bank 2 sensor 2) if it is faulty. Ensure to use an OEM or high-quality aftermarket replacement part.
- Check and repair any damaged wiring or connections related to the oxygen sensor.
- Inspect the exhaust system for leaks and repair as necessary.
- Clear the code and perform a test drive to ensure the issue has been resolved.
Cost to Fix P0159 Infiniti
The cost of repairing a P0159 code on an Infiniti vehicle can vary depending on the specific model, year, and location. Typically, the cost of replacing an oxygen sensor can range from $200 to $400, including parts and labor. Additional costs may apply if there are other underlying issues that need to be addressed. It's essential to consult with a qualified mechanic or dealership to get an accurate estimate for the repair. Keep in mind that labor rates and diagnostic fees can vary, so it's advisable to shop around for the best deal.
Tech Notes for P0159 Infiniti
When is the Code Detected?
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Information for Specific Infiniti Models
- P0159 2003 Infiniti G35 — HO2S22 Slow Response
- P0159 2004 Infiniti G35 — HO2S22 Slow Response
- P0159 2005 Infiniti G35 — HO2S22 Slow Response
- P0159 2006 Infiniti G35 — HO2S22 Slow Response
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