AutoCodes – GMC – P1192 2017 GMC Sierra

P1192 2017 GMC Sierra 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 2017 GMC Sierra 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 187

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

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 2017 GMC Sierra 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 2017 GMC Sierra - O2 Low Reference Circuit (NOx Sensor 1) - AutoCodes.com — P1192 2017 GMC Sierra Code - O2 Low Reference Circuit (NOx Sensor 1)

What does this mean?

What are the Possible Causes of the DTC P1192 2017 GMC Sierra?

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 2017 GMC Sierra?

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 2017 GMC Sierra 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 2017 GMC Sierra 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 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P1192 on a 2017 GMC Sierra indicating an O2 Low Reference Circuit issue?

- Common symptoms include decreased engine performance, poor fuel economy, rough idling, and the illumination of the Check Engine Light.

2. What are the possible causes of OBDII code P1192 on a 2017 GMC Sierra related to the O2 Low Reference Circuit?

- Potential causes include a faulty NOx sensor, damaged wiring or connectors in the O2 sensor circuit, or issues with the vehicle's ECM.

3. How can I diagnose the O2 Low Reference Circuit issue causing OBDII code P1192 on my 2017 GMC Sierra?

- Diagnostic steps may include checking the sensor's wiring and connectors for damage, testing the sensor's voltage output, and inspecting the ECM for any faults.

4. Can a dirty or failing NOx sensor cause the O2 Low Reference Circuit problem associated with code P1192 on a 2017 GMC Sierra?

- Yes, a dirty or failing NOx sensor can lead to the O2 Low Reference Circuit issue and trigger code P1192 on a 2017 GMC Sierra.

5. What are some repair tips for addressing OBDII code P1192 on a 2017 GMC Sierra related to the O2 Low Reference Circuit?

- Repair tips may include replacing the NOx sensor, repairing damaged wiring or connectors, resetting the ECM, and clearing the trouble code.

6. Is it safe to continue driving a 2017 GMC Sierra with OBDII code P1192 indicating an O2 Low Reference Circuit problem?

- It is recommended to address the issue promptly to prevent potential damage to the vehicle's emissions system and ensure optimal engine performance.

7. Can a DIY enthusiast with automotive knowledge resolve the O2 Low Reference Circuit issue causing OBDII code P1192 on a 2017 GMC Sierra?

- Depending on the individual's skills and tools available, some DIY enthusiasts may be able to address the problem by following repair guides and utilizing diagnostic equipment.

8. How much does it typically cost to repair the O2 Low Reference Circuit issue triggering OBDII code P1192 on a 2017 GMC Sierra?

- The cost of repairs can vary based on the specific cause of the issue, but it may involve expenses for parts such as a new NOx sensor, wiring repairs, or potential ECM reprogramming.

9. Will resetting the Check Engine Light resolve OBDII code P1192 on a 2017 GMC Sierra related to the O2 Low Reference Circuit?

- While clearing the trouble code may temporarily turn off the Check Engine Light, it is crucial to diagnose and address the underlying issue to prevent future occurrences.

10. Can extreme weather conditions or driving habits contribute to the development of the O2 Low Reference Circuit problem leading to OBDII code P1192 on a 2017 GMC Sierra?

- Yes, extreme weather conditions, prolonged exposure to high temperatures, or aggressive driving habits can potentially affect the NOx sensor and the O2 sensor circuit, leading to code P1192.