P0145 Infiniti Code - Heated Oxygen Sensor 3 Circuit Slow Response
Quick Answer
The P0145 code in an Infiniti indicates that there is a problem with the Heated Oxygen Sensor 3 (HO2S3) circuit, specifically a slow response. Common causes include Faulty Heated Oxygen Sensor 3, Wiring or connector issues in the HO2S3 circuit, Exhaust leaks near the sensor. 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
- P0145 Infiniti indicates Heated Oxygen Sensor 3 Circuit Slow Response.
- Common causes
- Common causes include Faulty Heated Oxygen Sensor 3, Wiring or connector issues in the HO2S3 circuit, Exhaust leaks near the sensor.
- 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 P0145 Infiniti Description
The P0145 code in an Infiniti indicates that there is a problem with the Heated Oxygen Sensor 3 (HO2S3) circuit, specifically a slow response. The HO2S3 is responsible for monitoring the oxygen levels in the exhaust gases and providing feedback to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion. A slow response from the sensor can lead to incorrect fuel trim adjustments, affecting the engine's performance and emissions.
Common Causes of P0145 Infiniti
- Faulty Heated Oxygen Sensor 3
- Wiring or connector issues in the HO2S3 circuit
- Exhaust leaks near the sensor
- Engine running rich or lean
- ECM software issues
Symptoms of P0145 Infiniti
- Check engine light illuminated on the dashboard
- Decreased fuel efficiency
- Rough idling or stalling
- Engine misfires
- Increased emissions
How to Fix P0145 Infiniti
- Diagnose the code using a scan tool to confirm the P0145 error code and determine the exact cause of the slow response.
- Inspect the wiring and connectors in the HO2S3 circuit for any damage or corrosion. Repair or replace as needed.
- Test the HO2S3 sensor using a multimeter to check for proper operation. Replace the sensor if it is faulty.
- Clear the code from the ECM memory and perform a test drive to ensure the issue has been resolved.
- If the code persists, further diagnostics may be necessary to identify any underlying issues with the engine or exhaust system.
Cost to Fix P0145 Infiniti
The typical repair costs for addressing a P0145 code in an Infiniti can range from $150 to $400, including parts and labor. This estimate may vary depending on the specific model of the vehicle, the location of the repair shop, and the extent of the repairs needed. It is recommended to consult with a qualified mechanic or dealership to get an accurate cost estimate for resolving this issue. Keep in mind that diagnosis time and labor rates can vary, so it's advisable to inquire about these factors before proceeding with the repair.
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