P119C 2016 GMC Sierra Code - NOx Sensor 1 Signal Circuit High Voltage
Quick Answer
The P119C diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates an issue with the NOx (Nitrogen Oxide) Sensor 1 Signal Circuit registering high voltage. Common causes include Faulty NOx sensor, Wiring or connector issues, ECM malfunction. 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
- P119C 2016 GMC Sierra indicates NOx Sensor 1 Signal Circuit High Voltage.
- Common causes
- Common causes include Faulty NOx sensor, Wiring or connector issues, ECM malfunction.
- 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 P119C 2016 GMC Sierra Description
The P119C diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates an issue with the NOx (Nitrogen Oxide) Sensor 1 Signal Circuit registering high voltage. This sensor is responsible for monitoring the levels of nitrogen oxide emissions in the vehicle's exhaust system. When the signal voltage is detected as being too high, it suggests that there is a problem with the sensor or its circuitry, which can lead to inaccurate emissions readings and potentially affect the vehicle's performance and emissions output.
Common Causes of P119C 2016 GMC Sierra
- Faulty NOx sensor
- Wiring or connector issues
- ECM malfunction
- Exhaust system leaks
- Poor-quality diesel fuel
Symptoms of P119C 2016 GMC Sierra
- Check Engine Light illuminated
- Reduced fuel efficiency
- Engine misfires
- Rough idling
- Increased emissions output
How to Fix P119C 2016 GMC Sierra
- Diagnose the issue using a scan tool to confirm the P119C code and check for any other related codes.
- Inspect the NOx sensor, wiring, and connectors for any visible damage or corrosion.
- Test the NOx sensor's voltage output to determine if it is within the specified range.
- Replace the NOx sensor if it is found to be faulty.
- Clear the DTC and perform a test drive to ensure the repair was successful.
Cost to Fix P119C 2016 GMC Sierra
The cost of repairing a NOx Sensor 1 Signal Circuit High Voltage issue can vary depending on the specific cause of the problem. In general, replacing the NOx sensor itself can range from $200 to $500, including parts and labor. However, if additional wiring or ECM repairs are needed, the total cost could be higher. It's advisable to consult with a trusted mechanic or dealership to get an accurate estimate based on your vehicle's make and model.
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Frequently Asked Questions about P119C 2016 GMC Sierra Code
What does the OBDII code P119C mean on a 2016 GMC Sierra?
The P119C code indicates a high voltage issue in the signal circuit of NOx Sensor 1, which monitors nitrogen oxide emissions.
What are the symptoms of the P119C code on a 2016 GMC Sierra?
Symptoms may include the check engine light turning on, reduced fuel efficiency, poor engine performance, or the vehicle entering limp mode.
What causes the P119C code on a 2016 GMC Sierra?
Common causes include a faulty NOx Sensor 1, damaged sensor wiring, corroded electrical connectors, or issues with the engine control module (ECM).
Can driving with the P119C code damage my 2016 GMC Sierra?
Driving with this code may not immediately damage the vehicle, but it can lead to higher emissions, reduced performance, and potential long-term damage to the emissions system.
How do I diagnose the P119C code on a 2016 GMC Sierra?
Diagnose the issue by inspecting the NOx sensor wiring for damage, testing the sensor with a multimeter, and using a scan tool to monitor live data from the NOx sensor.
How do I fix the P119C code on a 2016 GMC Sierra?
Repairs may involve replacing the NOx Sensor 1, repairing damaged wiring or connectors, or updating/reprogramming the ECM if necessary.
How much does it cost to fix the P119C code on a 2016 GMC Sierra?
Replacing a NOx sensor can cost $300-$800, including parts and labor, depending on the location and the shop. Wiring repairs may cost less.
Can a bad NOx sensor cause other problems in a 2016 GMC Sierra?
Yes, a bad NOx sensor can lead to poor emissions control, reduced fuel efficiency, and potential damage to other components in the emissions system.
How can I prevent the P119C code from appearing on my 2016 GMC Sierra?
Regular maintenance, inspecting sensor wiring, and ensuring the use of high-quality diesel exhaust fluid (DEF) can help prevent this issue.
Do I need to reset the code after fixing the problem?
Yes, after repairing the issue, use an OBDII scanner to clear the code and monitor if it returns to confirm the fix.
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