AutoCodes – Chevrolet – P119E 2016 Chevrolet Silverado

P119E 2016 Chevrolet Silverado Code - NOx Sensor 2 Signal Circuit Low Voltage

Quick Answer

The Nitrogen Oxides (NOx) sensors are part of the selective catalytic reduction system, a device used to reduce NOx emission on diesel engines. Common causes include Faulty Nitrogen Oxides (NOx) Sensor 2, Nitrogen Oxides Sensor 2 harness is open or shorted, Nitrogen Oxides Sensor 2 circuit poor electrical connection. 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 2016 Chevrolet Silverado indicates NOx Sensor 2 Signal Circuit Low Voltage.
Common causes: Common causes include Faulty Nitrogen Oxides (NOx) Sensor 2, Nitrogen Oxides Sensor 2 harness is open or shorted, Nitrogen Oxides Sensor 2 circuit poor electrical connection.
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 Popularity 250

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Mar 24, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P119E 2016 Chevrolet Silverado Description

The Nitrogen Oxides (NOx) sensors are part of the selective catalytic reduction system, a device used to reduce NOx emission on diesel engines. There are two NOx sensors, one placed upstream of selective catalytic reduction, to measure inlet NOx concentration, and one placed downstream. They are connected with the control module via CAN and all the information is exchanged through it. Since it is a smart sensor, all the electrical monitoring is performed inside the sensor and only the results are sent to the Engine Control Module (ECM). Each NOx sensor contains a sensing cell, a pumping cell, and a heater. A sample of exhaust gas passes through a diffusion gap between the sensing cell and the pumping cell. The NOx sensor maintains a constant reference voltage across the sensing cell. An electronic circuit within the sensor controls the pump current through the pumping cell in order to maintain a constant voltage in the sensing cell. The amount of current required to maintain the reference voltage in the sensing cell is proportional to the concentration of NOx in the exhaust. The ECM varies the amount of diesel exhaust fluid (reductant) added by varying the reductant injector duty cycle in response to changes in engine exhaust NOx levels. The smart NOx sensors consist of two components, the NOx module and the NOx sensor element that are serviced as a unit. A circuit or performance condition with a NOx sensor is detected by the NOx sensor module. The smart NOx sensor module communicates the condition to the ECM over the serial data line. The ECM sets a DTC when a serial data message is received from the NOx sensor module. The Diagnostic Trouble Code (DTC) will be set if the ECM software detects a fault in the NOx sensor circuitry or a performance fault in the NOx sensor for greater than 2 s.

OBDII Code P119E 2016 Chevrolet Silverado - NOx Sensor 2 Signal Circuit Low Voltage - AutoCodes.com — P119E 2016 Chevrolet Silverado Code - NOx Sensor 2 Signal Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P119E 2016 Chevrolet Silverado?

Faulty Nitrogen Oxides (NOx) Sensor 2
Nitrogen Oxides Sensor 2 harness is open or shorted
Nitrogen Oxides Sensor 2 circuit poor electrical connection

How to Fix the DTC P119E 2016 Chevrolet Silverado?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P119E 2016 Chevrolet Silverado code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P119E 2016 Chevrolet Silverado code?

Need more information on how to fix the P119E 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P119E 2016 Chevrolet Silverado Code

What does OBDII code P119E mean for a 2016 Chevrolet Silverado?

Code P119E indicates a problem with the NOx Sensor 2 signal circuit, specifically low voltage detected by the engine control module (ECM).

What are the symptoms of code P119E in a 2016 Chevrolet Silverado?

Common symptoms include reduced engine performance, increased emissions, poor fuel efficiency, and the check engine light being illuminated.

What causes code P119E in a 2016 Chevrolet Silverado?

Causes can include a faulty NOx sensor, damaged wiring or connectors, corrosion in the sensor circuit, or issues with the ECM itself.

Can I drive my 2016 Chevrolet Silverado with code P119E?

While the vehicle may still be drivable, prolonged operation with this code can lead to higher emissions and potential damage to the catalytic converter.

How is code P119E diagnosed in a 2016 Chevrolet Silverado?

Technicians use an OBDII scanner to retrieve the code, inspect the NOx sensor and circuit for damage or corrosion, and may perform live data analysis to confirm the low voltage issue.

How do you fix code P119E in a 2016 Chevrolet Silverado?

Repairs typically involve replacing the faulty NOx sensor, repairing damaged wiring or connectors, and clearing the code from the ECM.

Is the NOx Sensor 2 expensive to replace in a 2016 Chevrolet Silverado?

The cost of replacing the NOx sensor varies but typically ranges from $200 to $500, including parts and labor.

Can a dirty exhaust system cause code P119E in a 2016 Chevrolet Silverado?

A dirty or clogged exhaust system is unlikely to directly cause this code but can exacerbate issues with emissions sensors like the NOx sensor.

How can I prevent code P119E in my 2016 Chevrolet Silverado?

Regular maintenance, including checking exhaust components and wiring for damage, can help prevent NOx sensor issues and related codes.

Will a software update fix code P119E in a 2016 Chevrolet Silverado?

In some cases, a software update for the ECM may resolve the issue, but this is only applicable if the problem stems from incorrect programming rather than hardware failure.