P1164 Infiniti Code - HO2S21 Rich Shift Monitoring
Quick Answer
The P1164 Infiniti code refers to the "HO2S21 Rich Shift Monitoring" in the vehicle's system. Common causes include Faulty oxygen sensor, Leaking or stuck fuel injector, Malfunctioning mass airflow sensor. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1164 Infiniti indicates HO2S21 Rich Shift Monitoring.
- Common causes
- Common causes include Faulty oxygen sensor, Leaking or stuck fuel injector, Malfunctioning mass airflow sensor.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P1164 Infiniti Description
The P1164 Infiniti code refers to the "HO2S21 Rich Shift Monitoring" in the vehicle's system. This code indicates that the oxygen sensor located in bank 2 sensor 1 is detecting a rich air-fuel mixture in the exhaust gases. The oxygen sensor (O2 sensor) is responsible for measuring the oxygen content in the exhaust gases and providing feedback to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion.
Common Causes of P1164 Infiniti
- Faulty oxygen sensor
- Leaking or stuck fuel injector
- Malfunctioning mass airflow sensor
- Clogged air filter
- Engine misfire
Symptoms of P1164 Infiniti
- Decreased fuel efficiency
- Engine misfires or hesitation
- Rough idling or stalling
- Check Engine Light illuminated
- Strong smell of fuel in the exhaust
How to Fix P1164 Infiniti
- Use an OBD-II scanner to confirm the P1164 code and identify the specific issue.
- Inspect the oxygen sensor in bank 2 sensor 1 for any damage or contamination. Replace if necessary.
- Check the fuel injectors for leaks or blockages. Clean or replace as needed.
- Inspect the mass airflow sensor and air filter for any dirt or debris. Clean or replace if necessary.
- Clear the code with the OBD-II scanner and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P1164 Infiniti
The cost of repairing the P1164 Infiniti code can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. On average, the cost of replacing an oxygen sensor can range from $200 to $400, including parts and labor. However, additional repairs or component replacements may increase the total cost. It is recommended to consult a professional mechanic for a more accurate estimate based on the vehicle's make and model, as well as the extent of the repair needed.
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Information for Specific Infiniti Models
- P1164 2003 Infiniti G35 — HO2S21 Rich Shift Monitoring
Frequently Asked Questions about P1164 Infiniti Code
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