P119E 2017 GMC Sierra Code - NOx Sensor 2 Signal Circuit Low Voltage
Quick Answer
The P119E diagnostic trouble code for a 2017 GMC Sierra indicates a problem with the NOx Sensor 2 Signal Circuit, specifically low voltage. Common causes include Failed NOx sensor, Wiring or connection issues in the sensor circuit, Corrosion or damage to sensor connectors. 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 2017 GMC Sierra indicates NOx Sensor 2 Signal Circuit Low Voltage.
- Common causes
- Common causes include Failed NOx sensor, Wiring or connection issues in the sensor circuit, Corrosion or damage to sensor connectors.
- 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 P119E 2017 GMC Sierra Description
The P119E diagnostic trouble code for a 2017 GMC Sierra indicates a problem with the NOx Sensor 2 Signal Circuit, specifically low voltage. The NOx sensor is responsible for monitoring the levels of nitrogen oxide emissions in the exhaust system. The sensor provides feedback to the engine control module (ECM) to ensure the vehicle is operating within emissions regulations and to optimize fuel efficiency. A low voltage reading from the NOx Sensor 2 can indicate a malfunction in the sensor or its circuit, potentially leading to inaccurate emissions readings and poor engine performance.
Common Causes of P119E 2017 GMC Sierra
- Failed NOx sensor.
- Wiring or connection issues in the sensor circuit.
- Corrosion or damage to sensor connectors.
- ECM software or hardware issues.
- Exhaust leaks near the sensor.
Symptoms of P119E 2017 GMC Sierra
- Check engine light illuminated on the dashboard.
- Decreased fuel efficiency.
- Rough idling or stalling.
- Reduced engine power.
- Increased emissions.
How to Fix P119E 2017 GMC Sierra
- Diagnose the issue by checking the wiring, connectors, and sensor for any visible damage.
- Use a multimeter to test the voltage output of the NOx Sensor 2.
- Replace the NOx sensor if it is found to be faulty.
- Clear the diagnostic trouble codes with a scan tool.
- Perform a test drive to ensure the issue has been resolved.
Cost to Fix P119E 2017 GMC Sierra
The cost of repairing a NOx Sensor 2 Signal Circuit Low Voltage issue in a 2017 GMC Sierra can vary depending on the specific problem and the labor rates of the repair shop. On average, the cost of replacing a NOx sensor can range from $200 to $500, including parts and labor. Additional costs may apply if there are wiring or connection issues that need to be addressed. It is recommended to contact local auto repair shops for accurate pricing information.
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Frequently Asked Questions about P119E 2017 GMC Sierra Code
What does the OBDII code P119E mean on a 2017 GMC Sierra?
P119E indicates a low voltage issue in the signal circuit of NOx Sensor 2, which monitors nitrogen oxide emissions downstream of the SCR (Selective Catalytic Reduction) system.
What are the symptoms of a P119E code on a 2017 GMC Sierra?
Common symptoms include the Check Engine Light turning on, reduced engine power, increased fuel consumption, and possible emission test failure.
What causes the P119E code to appear on a GMC Sierra?
Potential causes include a faulty NOx Sensor 2, damaged wiring or connectors in the sensor circuit, excessive soot buildup, or issues with the vehicle's SCR system.
Can I drive my 2017 GMC Sierra with a P119E code?
Driving with this code is not recommended, as it may lead to reduced fuel efficiency, increased emissions, or potential damage to the emission control system.
How do I fix the P119E code on a 2017 GMC Sierra?
Repairs often involve inspecting and repairing the wiring or connectors, cleaning or replacing NOx Sensor 2, and addressing any issues in the SCR system.
How do I test NOx Sensor 2 for a P119E code?
Use a multimeter to check the voltage in the sensor's circuit, and ensure the wiring and connectors are free of damage or corrosion.
Can a software update fix the P119E code on a GMC Sierra?
In some cases, a PCM (Powertrain Control Module) update from the dealership may resolve the issue if it’s related to incorrect sensor calibration.
What tools are needed to diagnose a P119E code?
You’ll need an OBDII scanner, a multimeter, and possibly a NOx sensor-specific diagnostic tool to accurately diagnose the issue.
How much does it cost to fix a P119E code on a 2017 GMC Sierra?
Repair costs vary but can range from $200 to $1,000 depending on whether the NOx sensor needs replacement or more extensive repairs are required.
Can a dirty DEF system cause the P119E code?
Yes, contamination or clogging in the DEF (Diesel Exhaust Fluid) system can affect NOx sensor readings, potentially triggering the P119E code.
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