P116A 2018 GMC Sierra Code - O2 Signal Circuit (NOx Sensor 1)
Quick Answer
The P116A diagnostic trouble code (DTC) for a 2018 GMC Sierra relates to the O2 signal circuit for NOx Sensor 1. Common causes include Faulty NOx sensor, Damaged wiring or connectors in the sensor circuit, ECM software issue. 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
- P116A 2018 GMC Sierra indicates O2 Signal Circuit (NOx Sensor 1).
- Common causes
- Common causes include Faulty NOx sensor, Damaged wiring or connectors in the sensor circuit, ECM software issue.
- 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 P116A 2018 GMC Sierra Description
The P116A diagnostic trouble code (DTC) for a 2018 GMC Sierra relates to the O2 signal circuit for NOx Sensor 1. This code indicates a problem with the oxygen sensor signal circuit associated with the nitrogen oxide (NOx) sensor located before the catalytic converter. The NOx sensor is crucial for monitoring and controlling the emissions of nitrogen oxides, which are harmful pollutants.
Common Causes of P116A 2018 GMC Sierra
- Faulty NOx sensor
- Damaged wiring or connectors in the sensor circuit
- ECM software issue
- Exhaust leaks affecting sensor readings
- Contaminated sensor element
Symptoms of P116A 2018 GMC Sierra
- Decreased fuel efficiency
- Rough idling or stalling
- Check Engine Light illuminated
- Failed emissions test
- Reduced engine performance
How to Fix P116A 2018 GMC Sierra
- Use a diagnostic scanner to retrieve the specific trouble code and confirm the issue.
- Inspect the wiring and connectors associated with the NOx sensor for any damage or corrosion.
- Test the NOx sensor's functionality using a multimeter or oscilloscope.
- Replace the NOx sensor if it is found to be faulty.
- Clear the DTC and perform a test drive to ensure the issue has been resolved.
Cost to Fix P116A 2018 GMC Sierra
The cost of repairing a P116A code on a 2018 GMC Sierra can vary depending on the specific cause of the issue. Typically, the cost of a new NOx sensor ranges from $200 to $500, and labor costs can add another $100 to $200. Overall, the total repair cost may range from $300 to $700. It's important to note that labor rates at auto repair shops can vary, so it's advisable to check with local shops for more accurate pricing.
Need more information about the P116A 2018 GMC Sierra code?
Need more information on how to fix the P116A 2018 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P116A 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P116A 2018 GMC Sierra Code
1. What does OBDII code P116A mean on a 2018 GMC Sierra?
Code P116A indicates an issue with the O2 signal circuit of NOx Sensor 1, typically related to a malfunction or fault in the sensor's communication or signal.
2. What are the common symptoms of code P116A in a 2018 GMC Sierra?
Symptoms may include the Check Engine Light turning on, reduced fuel efficiency, poor engine performance, or increased emissions.
3. What causes the P116A code to appear?
Common causes include a faulty NOx Sensor 1, damaged wiring or connectors in the O2 signal circuit, or issues with the engine control module (ECM).
4. Can a dirty or clogged NOx sensor cause code P116A?
Yes, a dirty or clogged NOx sensor may fail to provide accurate readings, triggering the P116A code.
5. How can I diagnose code P116A on a 2018 GMC Sierra?
Start by using an OBDII scanner to confirm the code, inspect the wiring and connectors for damage, and test the NOx Sensor 1 for proper functionality.
6. Is it safe to drive with code P116A active on my GMC Sierra?
While the vehicle may still be drivable, ignoring the code can lead to decreased performance, increased emissions, and potential damage to other components.
7. How do I fix code P116A on a 2018 GMC Sierra?
Repairs may include replacing the NOx Sensor 1, repairing damaged wiring or connectors, or reprogramming/updating the ECM if necessary.
8. How much does it cost to fix the P116A code?
The repair cost varies but may range from $200 to $800 depending on whether the sensor, wiring, or ECM needs replacement or repair.
9. Can I clear the P116A code without replacing the sensor?
Clearing the code without addressing the root cause may result in the code returning. Proper diagnosis and repair are recommended.
10. How often do NOx sensors need to be replaced on a GMC Sierra?
NOx sensors typically last 80,000 to 100,000 miles but may fail earlier due to contamination, electrical issues, or harsh driving conditions.
Discuss the causes and fixes for P116A 2018 GMC Sierra OBDII Code
Code P116A 2018 GMC Sierra 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.