P1168 Code - Closed Loop Control Function Bank 2
Quick Answer
The P1168 code refers to an issue with the Closed Loop Control Function on Bank 2 of the vehicle's engine. Common causes include Faulty oxygen sensor on Bank 2, Wiring or connector issues in the oxygen sensor circuit, Vacuum leaks in the intake system. 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
- P1168 indicates Closed Loop Control Function Bank 2.
- Common causes
- Common causes include Faulty oxygen sensor on Bank 2, Wiring or connector issues in the oxygen sensor circuit, Vacuum leaks in the intake system.
- 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 P1168 Description
The P1168 code refers to an issue with the Closed Loop Control Function on Bank 2 of the vehicle's engine. This indicates that there is a problem with the oxygen sensor feedback loop on the second bank of cylinders. In a closed-loop system, the engine control module (ECM) uses the feedback from the oxygen sensors to adjust the air-fuel mixture in real-time for optimal combustion. When this system malfunctions, it can lead to poor engine performance, decreased fuel efficiency, and increased emissions. Ignoring this code can potentially cause damage to the catalytic converter over time.
Common Causes of P1168
- Faulty oxygen sensor on Bank 2
- Wiring or connector issues in the oxygen sensor circuit
- Vacuum leaks in the intake system
- Exhaust leaks near the oxygen sensor
- Issues with the ECM or engine control module
Symptoms of P1168
- Check Engine Light illuminated on the dashboard
- Reduced fuel efficiency
- Rough idling or stalling
- Engine misfires
- Increased emissions
How to Fix P1168
- Diagnose the specific cause of the P1168 code by using a scan tool to monitor the oxygen sensor readings on Bank 2.
- Inspect and test the oxygen sensor on Bank 2 for proper function and replace if necessary.
- Check the wiring and connectors in the oxygen sensor circuit for any damage or corrosion, repairing or replacing as needed.
- Inspect the intake and exhaust systems for leaks that may be affecting the oxygen sensor readings, repairing any leaks found.
- Clear the code from the ECM's memory and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P1168
The cost of repairing a P1168 code can vary depending on the specific cause of the issue and the labor rates in your area. In general, replacing an oxygen sensor can cost between $100 and $300, including parts and labor. However, if the issue is more complex and requires additional repairs or parts replacement, the cost can increase. It's recommended to consult with a trusted mechanic or auto repair shop for a more accurate estimate based on your vehicle's make and model.
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Code P1168 Information for Specific Makes
- P1168 Acura — Air/Fuel Ratio Sensor Label Low Voltage
- P1168 Ford — Fuel Rail Pressure Sensor Condition Low Pressure
- P1168 Honda — Air/Fuel Ratio Sensor Label Low Voltage
- P1168 Hyundai — O2 Sensor Heater Power Sensor 2 Bank 1
- P1168 Infiniti — Closed Loop Control Function Bank 2
- P1168 Lincoln — Fuel Rail Pressure Sensor Condition Low Pressure
- P1168 Mazda — Fuel Rail Pressure Sensor In Range But Low
- P1168 Mercury — Fuel Rail Pressure Sensor Condition Low Pressure
- P1168 Nissan — Closed Loop Control Function Bank 2
Frequently Asked Questions about P1168 Code
1. What does OBDII code P1168 indicate?
The code P1168 refers to a Closed Loop Control Function Bank 2 error, signaling an issue with the closed-loop control system on bank 2 of the vehicle.
2. What are common symptoms of OBDII code P1168?
Common symptoms of code P1168 may include poor engine performance, decreased fuel efficiency, rough idling, and potential stalling of the vehicle.
3. What are the possible causes of OBDII code P1168?
Potential causes of code P1168 include faulty oxygen sensors, issues with the air fuel ratio, vacuum leaks, exhaust system problems, or a malfunctioning catalytic converter.
4. How can I diagnose OBDII code P1168?
Diagnosing code P1168 typically involves using an OBDII scanner to retrieve the code, checking the oxygen sensors, inspecting the exhaust system for leaks, and testing the air fuel ratio.
5. How do I repair OBDII code P1168?
Repairing code P1168 may involve replacing faulty oxygen sensors, repairing any leaks in the exhaust system, addressing issues with the air fuel ratio, or replacing a malfunctioning catalytic converter.
6. Can I drive my vehicle with OBDII code P1168?
It is not recommended to drive your vehicle with an unresolved P1168 code, as it can lead to further damage and potentially unsafe driving conditions. It's best to address the issue promptly.
7. Will resetting the OBDII code P1168 make it go away permanently?
Simply resetting the code may temporarily clear the check engine light, but if the underlying issue causing code P1168 is not repaired, the code is likely to reappear.
8. How much does it cost to fix OBDII code P1168?
The cost of fixing code P1168 can vary depending on the specific cause of the issue and the labor rates in your area. It's advisable to get a diagnostic from a qualified mechanic for an accurate estimate.
9. Can a DIY enthusiast repair OBDII code P1168?
Depending on your mechanical skills and access to tools, some aspects of repairing code P1168 may be possible for a DIY enthusiast. However, complex issues like catalytic converter replacement may require professional assistance.
10. How often does OBDII code P1168 occur in vehicles?
Code P1168 is not as common as some other OBDII codes but can still occur in vehicles, particularly in older models or those with high mileage. Regular maintenance and prompt repairs can help prevent this code from appearing.
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