AutoCodes – Chevrolet – P119E 2014 Chevrolet Silverado

P119E 2014 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 2014 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 289

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 2014 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 2014 Chevrolet Silverado - NOx Sensor 2 Signal Circuit Low Voltage - AutoCodes.com — P119E 2014 Chevrolet Silverado Code - NOx Sensor 2 Signal Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P119E 2014 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 2014 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 2014 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 2014 Chevrolet Silverado code?

Need more information on how to fix the P119E 2014 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 2014 Chevrolet Silverado Code

What does the OBDII code P119E mean for a 2014 Chevrolet Silverado?

P119E indicates a low voltage signal issue in the circuit for NOx Sensor 2, which is responsible for monitoring nitrogen oxide levels in the exhaust system.

What are the symptoms of code P119E in a 2014 Chevrolet Silverado?

Common symptoms include the check engine light turning on, reduced fuel efficiency, decreased engine performance, and potentially entering limp mode.

What causes the P119E code to appear on a 2014 Chevrolet Silverado?

The code is typically caused by a faulty NOx Sensor 2, damaged wiring or connectors in the sensor circuit, or issues with the engine control module (ECM).

Can I drive my 2014 Chevrolet Silverado with a P119E code?

Driving with a P119E code is not recommended, as it can lead to reduced engine performance and potential damage to the emission control system.

How do you diagnose the P119E code on a 2014 Chevrolet Silverado?

Diagnosis involves using an OBDII scanner to confirm the code, visually inspecting the wiring and connectors for NOx Sensor 2, and testing the sensor for proper functionality.

How is the P119E code repaired on a 2014 Chevrolet Silverado?

Repairs may include replacing the NOx Sensor 2, repairing or replacing damaged wiring or connectors, and, in rare cases, reprogramming or replacing the ECM.

What tools are needed to fix the P119E code on a 2014 Chevrolet Silverado?

Common tools include an OBDII scanner, a multimeter for electrical testing, and basic hand tools for accessing and replacing the sensor.

How much does it cost to repair the P119E code on a 2014 Chevrolet Silverado?

Repair costs can range from $200 to $600, depending on whether the sensor, wiring, or ECM requires replacement.

What is the function of NOx Sensor 2 in a 2014 Chevrolet Silverado?

NOx Sensor 2 measures nitrogen oxide levels in the exhaust after the selective catalytic reduction (SCR) system to ensure proper emissions performance.

Can a software update fix the P119E code on a 2014 Chevrolet Silverado?

In some cases, a software update for the ECM may resolve the issue, but this is less common and typically determined during diagnosis.