AutoCodes – Chevrolet – P1192 2018 Chevrolet Silverado

P1192 2018 Chevrolet Silverado Code - O2 Low Reference Circuit (NOx Sensor 1)

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, Nitrogen Oxides Sensor harness is open or shorted, Nitrogen Oxides Sensor 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: P1192 2018 Chevrolet Silverado indicates O2 Low Reference Circuit (NOx Sensor 1).
Common causes: Common causes include Faulty Nitrogen Oxides (NOx) Sensor, Nitrogen Oxides Sensor harness is open or shorted, Nitrogen Oxides Sensor 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 P1192 2018 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 P1192 2018 Chevrolet Silverado - O2 Low Reference Circuit (NOx Sensor 1) - AutoCodes.com — P1192 2018 Chevrolet Silverado Code - O2 Low Reference Circuit (NOx Sensor 1)

What does this mean?

What are the Possible Causes of the DTC P1192 2018 Chevrolet Silverado?

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

How to Fix the DTC P1192 2018 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 P1192 2018 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 P1192 2018 Chevrolet Silverado code?

Need more information on how to fix the P1192 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P1192 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P1192 in a 2018 Chevrolet Silverado?

- Common symptoms include poor engine performance, reduced fuel efficiency, and the illumination of the Check Engine Light.

2. What does the O2 Low Reference Circuit (NOx Sensor 1) code P1192 indicate in a 2018 Chevrolet Silverado?

- This code indicates an issue with the low reference circuit of the NOx sensor 1 in the exhaust system.

3. What are possible causes of OBDII code P1192 in a 2018 Chevrolet Silverado?

- Possible causes include a faulty NOx sensor, damaged wiring or connectors in the O2 sensor circuit, or issues with the engine control module.

4. How can I diagnose the O2 Low Reference Circuit (NOx Sensor 1) code P1192 in my 2018 Chevrolet Silverado?

- Diagnosis involves inspecting the NOx sensor and its wiring for damage, checking the connections, and using a scan tool to monitor sensor data.

5. Can I continue driving my 2018 Chevrolet Silverado with OBDII code P1192 active?

- It is not recommended to continue driving with this code active, as it can lead to further engine damage and reduced fuel efficiency.

6. How can I repair OBDII code P1192 in my 2018 Chevrolet Silverado?

- Repair options include replacing the NOx sensor, repairing damaged wiring or connectors, or reprogramming the engine control module.

7. Are there any DIY tips for addressing O2 Low Reference Circuit (NOx Sensor 1) code P1192 in a 2018 Chevrolet Silverado?

- DIY enthusiasts can start by visually inspecting the sensor and wiring for any visible issues before consulting a professional technician.

8. How much does it typically cost to fix OBDII code P1192 in a 2018 Chevrolet Silverado?

- The cost of repair can vary depending on the exact cause of the code, but it may range from $200 to $500 or more, including parts and labor.

9. Can a mechanic reset the Check Engine Light after repairing OBDII code P1192 in a 2018 Chevrolet Silverado?

- Yes, a mechanic can reset the Check Engine Light using a diagnostic scan tool after addressing the underlying issue causing the P1192 code.

10. Is O2 Low Reference Circuit (NOx Sensor 1) code P1192 a common problem in 2018 Chevrolet Silverado vehicles?

- While not extremely common, issues with the NOx sensor and related circuits can occur in 2018 Chevrolet Silverado trucks, leading to the P1192 code.