AutoCodes – GMC – P2206 2014 GMC Sierra

P2206 2014 GMC Sierra Code - NOx Sensor 1 Heater Control 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, 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: P2206 2014 GMC Sierra indicates NOx Sensor 1 Heater Control Circuit Low Voltage.
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 165

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 P2206 2014 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 P2206 2014 GMC Sierra - NOx Sensor 1 Heater Control Circuit Low Voltage - AutoCodes.com — P2206 2014 GMC Sierra Code - NOx Sensor 1 Heater Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2206 2014 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 P2206 2014 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 P2206 2014 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 P2206 2014 GMC Sierra code?

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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 P2206 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code P2206 in a 2014 GMC Sierra related to the NOx Sensor 1 Heater Control Circuit Low Voltage?

The common symptoms include decreased fuel efficiency, failed emissions test, rough idling, and the illumination of the check engine light.

2. What are the potential causes of OBDII code P2206 in a 2014 GMC Sierra?

The potential causes can include a faulty NOx sensor, damaged wiring or connectors in the sensor circuit, or a malfunctioning powertrain control module (PCM).

3. How can I diagnose OBDII code P2206 in my 2014 GMC Sierra?

Diagnosing this code involves using a diagnostic scanner to retrieve the trouble codes, inspecting the NOx sensor and its connections, and testing the sensor's heater circuit for proper voltage.

4. Can a DIY enthusiast repair OBDII code P2206 in a 2014 GMC Sierra?

While some DIY enthusiasts may attempt to address this issue, it is recommended to seek professional help due to the complexity of diagnosing and repairing the NOx sensor and its related circuits.

5. Are there any quick repair tips for addressing OBDII code P2206 in a 2014 GMC Sierra?

Quick repair tips include checking and cleaning the sensor connectors, ensuring proper wiring connections, and verifying the sensor's operation using a multimeter.

6. How critical is it to address OBDII code P2206 promptly in a 2014 GMC Sierra?

It is important to address this code promptly to prevent potential damage to the catalytic converter, ensure optimal engine performance, and maintain compliance with emission regulations.

7. Can driving with OBDII code P2206 in a 2014 GMC Sierra cause further damage to the vehicle?

Continued driving with this code may lead to increased emissions, reduced fuel efficiency, and potential damage to the catalytic converter over time.

8. How much does it typically cost to repair OBDII code P2206 in a 2014 GMC Sierra?

Repair costs for this code can vary depending on the specific issue, but they may range from $200 to $600, including parts and labor.

9. Is it necessary to reset the OBDII system after repairing code P2206 in a 2014 GMC Sierra?

Yes, it is recommended to reset the OBDII system after repairing the issue to clear the trouble codes and ensure the check engine light is no longer illuminated.

10. Can extreme weather conditions affect the NOx Sensor 1 Heater Control Circuit and trigger OBDII code P2206 in a 2014 GMC Sierra?

Extreme cold or hot weather conditions can potentially affect the NOx sensor's performance and trigger the code, making it important to ensure proper insulation and protection for the sensor in such environments.