P119E 2018 GMC Sierra Code - NOx Sensor 2 Signal Circuit Low Voltage
Quick Answer
The P119E diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates a problem with the NOx (Nitrogen Oxide) Sensor 2 Signal Circuit, specifically a low voltage issue. Common causes include Faulty NOx sensor, Wiring or connector issues in the NOx sensor circuit, Corrosion or damage to sensor components. 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
- P119E 2018 GMC Sierra indicates NOx Sensor 2 Signal Circuit Low Voltage.
- Common causes
- Common causes include Faulty NOx sensor, Wiring or connector issues in the NOx sensor circuit, Corrosion or damage to sensor components.
- 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 P119E 2018 GMC Sierra Description
The P119E diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates a problem with the NOx (Nitrogen Oxide) Sensor 2 Signal Circuit, specifically a low voltage issue. The NOx sensor is a crucial component in the vehicle's emissions control system, responsible for monitoring and regulating the levels of nitrogen oxide emissions. When the sensor detects low voltage in its signal circuit, it means that there is a potential malfunction or fault that needs to be addressed.
Common Causes of P119E 2018 GMC Sierra
- Faulty NOx sensor
- Wiring or connector issues in the NOx sensor circuit
- Corrosion or damage to sensor components
- Engine misfire or running rich conditions
- Issues with the vehicle's onboard computer system
Symptoms of P119E 2018 GMC Sierra
- Check engine light illuminated
- Reduced fuel efficiency
- Poor engine performance
- Failed emissions test
- Rough idling or hesitation during acceleration
How to Fix P119E 2018 GMC Sierra
- Diagnose the issue using a scan tool to confirm the P119E code and pinpoint the exact cause of the low voltage signal circuit problem.
- Inspect the NOx sensor, wiring, and connectors for any visible damage or corrosion. Replace any damaged components as needed.
- Test the NOx sensor's voltage output to ensure it is within the manufacturer's specified range. Replace the sensor if it is malfunctioning.
- Clear the DTC and reset the vehicle's computer system to see if the issue has been resolved.
- Perform a test drive to verify that the repair has successfully addressed the low voltage signal circuit problem with the NOx sensor.
Cost to Fix P119E 2018 GMC Sierra
The typical repair costs for addressing a P119E code on a 2018 GMC Sierra can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, replacing a faulty NOx sensor and addressing wiring or connector issues can range from $200 to $500, including parts and labor. However, it's important to note that diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to consult with a trusted mechanic or dealership to get a more accurate estimate based on the specific circumstances of the vehicle in question.
Need more information about the P119E 2018 GMC Sierra code?
Need more information on how to fix the P119E 2018 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P119E 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P119E 2018 GMC Sierra Code
What does the OBDII code P119E mean on a 2018 GMC Sierra?
P119E indicates that the NOx Sensor 2 (downstream sensor) is detecting a low voltage signal in its circuit, which can affect the vehicle's emissions control system.
What are the common symptoms of code P119E in a 2018 GMC Sierra?
Common symptoms include the check engine light turning on, reduced engine performance, increased emissions, and possible fuel efficiency loss.
What causes the P119E code to appear?
Possible causes include a faulty NOx Sensor 2, damaged or corroded wiring, poor electrical connections, or issues with the Engine Control Module (ECM).
Can I drive my 2018 GMC Sierra with code P119E?
Driving with this code is not recommended, as it can lead to higher emissions and potential damage to the emissions system if left unresolved.
How do I diagnose P119E on a 2018 GMC Sierra?
Start by scanning with an OBDII tool to confirm the code, then inspect the NOx Sensor 2, its wiring, and connectors for damage or corrosion. Further testing may involve checking the voltage and resistance of the sensor circuit.
How do you fix the P119E code?
Repairs may involve replacing the NOx Sensor 2, repairing or replacing damaged wiring or connectors, or reprogramming/updating the ECM if required.
How much does it cost to fix P119E on a 2018 GMC Sierra?
The cost depends on the issue. Replacing the NOx sensor typically ranges from $300 to $700, including parts and labor, while wiring repairs may cost less.
Can a dirty DEF system cause P119E?
Yes, contamination or issues in the Diesel Exhaust Fluid (DEF) system can contribute to sensor faults, as it affects NOx detection and emissions control.
How often do NOx sensors fail in a 2018 GMC Sierra?
NOx sensors can fail due to age, contamination, or extreme operating conditions. They typically last 80,000 to 150,000 miles but may fail sooner under harsh conditions.
Will clearing the P119E code fix the problem?
Clearing the code may turn off the check engine light temporarily, but it won't fix the underlying issue, and the code is likely to return until the problem is resolved.
Discuss the causes and fixes for P119E 2018 GMC Sierra OBDII Code
Code P119E 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.