P11FE 2017 Chevrolet Silverado Code - O2 Low Reference Circuit High Voltage (NOx Sensor 2)
Quick Answer
The P11FE diagnostic trouble code (DTC) in a 2017 Chevrolet Silverado indicates a problem with the O2 low reference circuit high voltage for NOx Sensor 2. Common causes include Faulty NOx Sensor: The most common cause of this code is a malfunctioning NOx sensor, which may need to be replaced, Wiring Issues: Problems with the wiring or connectors in the low reference circuit can also trigger this code, ECM Malfunction: A malfunction in the engine control module (ECM) can disrupt the communication with the NOx sensor, leading to voltage irregularities. 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
- P11FE 2017 Chevrolet Silverado indicates O2 Low Reference Circuit High Voltage (NOx Sensor 2).
- Common causes
- Common causes include Faulty NOx Sensor: The most common cause of this code is a malfunctioning NOx sensor, which may need to be replaced, Wiring Issues: Problems with the wiring or connectors in the low reference circuit can also trigger this code, ECM Malfunction: A malfunction in the engine control module (ECM) can disrupt the communication with the NOx sensor, leading to voltage irregularities.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P11FE 2017 Chevrolet Silverado Description
The P11FE diagnostic trouble code (DTC) in a 2017 Chevrolet Silverado indicates a problem with the O2 low reference circuit high voltage for NOx Sensor 2. This code points to an issue with the oxygen sensor's low reference circuit, specifically for the second NOx sensor in the vehicle's exhaust system. The NOx sensor plays a crucial role in monitoring and controlling the levels of nitrogen oxide (NOx) emissions from the vehicle.
Common Causes of P11FE 2017 Chevrolet Silverado
- Faulty NOx Sensor: The most common cause of this code is a malfunctioning NOx sensor, which may need to be replaced.
- Wiring Issues: Problems with the wiring or connectors in the low reference circuit can also trigger this code.
- ECM Malfunction: A malfunction in the engine control module (ECM) can disrupt the communication with the NOx sensor, leading to voltage irregularities.
- Exhaust System Leaks: Leaks in the exhaust system can affect the readings of the NOx sensor, causing the voltage to be out of range.
Symptoms of P11FE 2017 Chevrolet Silverado
- Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the vehicle's dashboard.
- Reduced Fuel Efficiency: A malfunctioning NOx sensor can cause the engine to run less efficiently, leading to decreased fuel economy.
- Rough Idling: The vehicle may experience rough idling or hesitation when accelerating due to incorrect sensor readings.
- Failed Emissions Test: If the NOx sensor is not functioning properly, the vehicle may fail emissions tests due to increased NOx emissions.
How to Fix P11FE 2017 Chevrolet Silverado
- Diagnose the Issue: Use a diagnostic scanner to retrieve the specific trouble code and pinpoint the exact cause of the problem.
- Inspect Wiring and Connectors: Check the wiring and connectors in the low reference circuit for any signs of damage or corrosion. Repair or replace as needed.
- Test NOx Sensor: Test the NOx sensor to determine if it is functioning properly. Replace the sensor if necessary.
- Clear Codes: After making the necessary repairs, clear the trouble codes from the vehicle's ECM to reset the check engine light.
- Test Drive: Take the vehicle for a test drive to ensure that the issue has been resolved and that the check engine light does not reappear.
Cost to Fix P11FE 2017 Chevrolet Silverado
The cost of repairing a P11FE code in a 2017 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, the cost of replacing a NOx sensor can range from $200 to $500, including parts and labor. Additional costs may be incurred if wiring repairs or ECM diagnostics are necessary. It's important to note that labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. For a more accurate estimate, it's recommended to consult with a local auto repair shop.
Need more information about the P11FE 2017 Chevrolet Silverado code?
Need more information on how to fix the P11FE 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P11FE 2017 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P11FE 2017 Chevrolet Silverado Code
1. What does the OBDII code P11FE mean for a 2017 Chevrolet Silverado?
The P11FE code indicates an issue with the O2 low reference circuit reporting high voltage, specifically related to NOx Sensor 2.
2. What are the common symptoms of the P11FE code?
Symptoms may include a check engine light, reduced fuel efficiency, poor engine performance, and potential emissions test failure.
3. What causes the P11FE code to appear?
Common causes include a faulty NOx Sensor 2, damaged wiring or connectors in the low reference circuit, or issues with the engine control module (ECM).
4. How is the P11FE code diagnosed?
A technician will use a scan tool to verify the code, inspect the wiring and connectors for damage, and test the NOx sensor for proper operation.
5. Can I drive my Silverado with the P11FE code?
While the vehicle may still be drivable, it is not recommended as it can lead to increased emissions, reduced performance, and potential damage to other components.
6. How do I fix the P11FE code on my 2017 Silverado?
Repairs may involve replacing the faulty NOx Sensor 2, repairing damaged wiring or connectors, or reprogramming/updating the ECM.
7. How much does it cost to repair the P11FE code?
The cost can vary but typically ranges from $200 to $600, depending on whether the NOx sensor or wiring needs repair or replacement.
8. Can a dirty exhaust system cause the P11FE code?
A dirty or clogged exhaust system is unlikely to cause this code directly but can contribute to NOx sensor issues over time.
9. How can I prevent the P11FE code from returning?
Regular maintenance, including inspecting and cleaning the exhaust system and ensuring good-quality fuel, can help prevent recurrence.
10. Is the P11FE code covered under warranty for a 2017 Silverado?
It may be covered under the emissions warranty if the vehicle is within the warranty period and mileage limits. Check with your dealer for specifics.
Discuss the causes and fixes for P11FE 2017 Chevrolet Silverado OBDII Code
Code P11FE 2017 Chevrolet Silverado comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.