P116C 2016 GMC Sierra Code - O2 Signal Circuit High Voltage (NOx Sensor 1)
Quick Answer
The P116C diagnostic trouble code (DTC) on a 2016 GMC Sierra indicates a problem with the O2 signal circuit high voltage for NOx Sensor 1. Common causes include Faulty NOx sensor, Wiring issues or shorts in the O2 sensor circuit, ECM software or programming issues. 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
- P116C 2016 GMC Sierra indicates O2 Signal Circuit High Voltage (NOx Sensor 1).
- Common causes
- Common causes include Faulty NOx sensor, Wiring issues or shorts in the O2 sensor circuit, ECM software or programming issues.
- 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 P116C 2016 GMC Sierra Description
The P116C diagnostic trouble code (DTC) on a 2016 GMC Sierra indicates a problem with the O2 signal circuit high voltage for NOx Sensor 1. The NOx sensor is responsible for monitoring the levels of nitrogen oxide in the exhaust gases to ensure compliance with emissions regulations. This code specifically points to a high voltage signal from the oxygen sensor, which can lead to incorrect fuel-air mixture readings and affect the vehicle's performance.
Common Causes of P116C 2016 GMC Sierra
- Faulty NOx sensor
- Wiring issues or shorts in the O2 sensor circuit
- ECM software or programming issues
- Exhaust leaks near the sensor
- Engine running rich or lean
Symptoms of P116C 2016 GMC Sierra
- Reduced fuel efficiency
- Engine misfires
- Rough idling or stalling
- Increased emissions
- Check Engine Light illuminated
How to Fix P116C 2016 GMC Sierra
- Diagnose the issue by checking the wiring, sensor connections, and sensor functionality.
- Test the NOx sensor and O2 sensor for proper operation.
- Replace the faulty sensor if necessary.
- Repair any wiring or circuit issues.
- Clear the error code and reset the ECM to relearn fuel trims.
Cost to Fix P116C 2016 GMC Sierra
The typical repair costs for addressing a P116C code on a 2016 GMC Sierra can vary depending on the specific cause of the issue. The cost of parts, such as a NOx sensor or wiring harness, can range from $100 to $300. Labor costs at auto repair shops generally fall between $80 and $150 per hour. Therefore, total repair costs could range from $200 to $500 or more, depending on the extent of the repair needed. It's recommended to get a detailed quote from a certified mechanic to determine the exact cost for your specific vehicle.
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Frequently Asked Questions about P116C 2016 GMC Sierra Code
What does OBDII code P116C mean on a 2016 GMC Sierra?
Code P116C indicates a high voltage issue in the O2 signal circuit of NOx Sensor 1, which monitors nitrogen oxide emissions in the exhaust system.
What are the symptoms of a P116C code on a 2016 GMC Sierra?
Common symptoms include the Check Engine Light being illuminated, reduced fuel efficiency, or the vehicle entering limp mode.
What causes the P116C code to appear?
The code can be caused by a faulty NOx sensor, damaged wiring or connectors in the O2 signal circuit, or issues with the engine control module (ECM).
How is the P116C code diagnosed?
A mechanic will use an OBDII scanner to confirm the code, inspect the NOx sensor and its wiring for damage, and test the signal voltage with a multimeter.
Can I drive my 2016 GMC Sierra with a P116C code?
It’s not recommended to drive for long periods with this code active, as it may lead to reduced performance, higher emissions, or further damage to the exhaust system.
How do I fix a P116C code on a 2016 GMC Sierra?
Repairs may include replacing the NOx sensor, repairing damaged wiring or connectors, or reprogramming the ECM if necessary.
What is the role of NOx Sensor 1 in the 2016 GMC Sierra?
NOx Sensor 1 measures nitrogen oxide levels in the exhaust to help the ECM optimize emissions control and meet environmental standards.
How much does it cost to fix a P116C code?
The repair cost depends on the issue, but replacing a NOx sensor typically ranges from $300 to $700, including parts and labor.
Can a P116C code be caused by bad fuel?
While unlikely, contaminated fuel can cause issues in the exhaust system, potentially affecting NOx sensor performance and triggering the code.
How can I prevent the P116C code from reoccurring?
Regular maintenance, including ensuring clean fuel, inspecting wiring, and replacing sensors as needed, can help prevent this code from reappearing.
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