P116B 2017 GMC Sierra Code - O2 Signal Circuit Low Voltage (NOx Sensor 1)
Quick Answer
The P116B diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates an issue with the O2 signal circuit low voltage, specifically related to the NOx sensor 1. Common causes include Contaminated or damaged NOx sensor, Faulty electrical connections to the sensor, Worn out NOx 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
- P116B 2017 GMC Sierra indicates O2 Signal Circuit Low Voltage (NOx Sensor 1).
- Common causes
- Common causes include Contaminated or damaged NOx sensor, Faulty electrical connections to the sensor, Worn out NOx 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 P116B 2017 GMC Sierra Description
The P116B diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates an issue with the O2 signal circuit low voltage, specifically related to the NOx sensor 1. This code typically points to a problem with the oxygen sensor that is responsible for monitoring the level of nitrogen oxide (NOx) emissions in the exhaust system. The NOx sensor plays a crucial role in ensuring that the vehicle meets emissions standards and operates efficiently.
Common Causes of P116B 2017 GMC Sierra
- Contaminated or damaged NOx sensor
- Faulty electrical connections to the sensor
- Worn out NOx sensor
- Issues with the ECM
- Wiring problems
Symptoms of P116B 2017 GMC Sierra
- Decreased fuel efficiency
- Rough idling
- Hesitation during acceleration
- Engine misfires
- Failed emissions test
How to Fix P116B 2017 GMC Sierra
- Begin by diagnosing the specific cause of the low voltage signal, which may involve testing the NOx sensor, checking its wiring, and inspecting the ECM.
- Replace the NOx sensor if it is found to be contaminated, damaged, or worn out.
- Repair any faulty electrical connections to the sensor or the ECM.
- Clear the DTC from the ECM memory and reset the system to see if the issue has been resolved.
- Test drive the vehicle to ensure that the O2 signal circuit is now functioning properly and that the symptoms associated with the code have been eliminated.
Cost to Fix P116B 2017 GMC Sierra
The typical repair costs for addressing a P116B code on a 2017 GMC Sierra can vary depending on the specific cause of the issue. Generally, replacing the NOx sensor and addressing any wiring or electrical problems can range from $200 to $500, including parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically falling between $80 and $150. Factors such as location, vehicle make and model, and engine type can also influence the final repair costs. For a more accurate estimate, it is recommended to consult with local auto repair shops.
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Frequently Asked Questions about P116B 2017 GMC Sierra Code
What does the OBDII code P116B mean on a 2017 GMC Sierra?
P116B indicates an issue with the O2 signal circuit of NOx Sensor 1, specifically low voltage being detected by the Engine Control Module (ECM).
What are the common symptoms of code P116B on a 2017 GMC Sierra?
Symptoms may include a check engine light, reduced fuel efficiency, poor engine performance, and possible emissions test failure.
What causes the P116B code to appear on a 2017 GMC Sierra?
Common causes include a faulty NOx sensor, damaged wiring or connectors in the O2 signal circuit, or an ECM issue.
Can I still drive my 2017 GMC Sierra with the P116B code?
While the vehicle may still be drivable, it could experience reduced performance and increased emissions. It's best to address the issue promptly to avoid further damage.
How do I troubleshoot the P116B code on a 2017 GMC Sierra?
Start by inspecting the wiring and connectors for damage or corrosion. If they look fine, test the NOx sensor for proper functionality and replace it if necessary.
Is the NOx sensor the same as an oxygen sensor?
No, the NOx sensor measures nitrogen oxide levels in the exhaust, while the oxygen sensor measures oxygen levels. They serve different purposes but are both part of the emissions system.
How much does it cost to fix the P116B code on a 2017 GMC Sierra?
The repair cost can vary depending on the issue. Replacing a NOx sensor typically costs $200–$600, including parts and labor.
Can a software update fix the P116B code on a 2017 GMC Sierra?
In some cases, a software update for the ECM may resolve the issue if it’s related to incorrect sensor calibration. Consult a dealership or qualified technician.
What tools are needed to diagnose the P116B code on a 2017 GMC Sierra?
You’ll need an OBDII scanner capable of reading live data, a multimeter to test voltage and continuity, and possibly a repair manual for detailed wiring diagrams.
What happens if I ignore the P116B code on my 2017 GMC Sierra?
Ignoring the code can lead to worsened fuel economy, increased emissions, potential damage to the catalytic converter, and failed emissions tests.
Discuss the causes and fixes for P116B 2017 GMC Sierra OBDII Code
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