AutoCodes – GMC – P2207 2014 GMC Sierra

P2207 2014 GMC Sierra Code - NOx Sensor 1 Heater Control Circuit High 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: P2207 2014 GMC Sierra indicates NOx Sensor 1 Heater Control Circuit High 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 164

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 P2207 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 P2207 2014 GMC Sierra - NOx Sensor 1 Heater Control Circuit High Voltage - AutoCodes.com — P2207 2014 GMC Sierra Code - NOx Sensor 1 Heater Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2207 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 P2207 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 P2207 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 P2207 2014 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 P2207 2014 GMC Sierra Code

1. What are the common symptoms of an OBDII code P2207 in a 2014 GMC Sierra related to NOx Sensor 1 Heater Control Circuit High Voltage?

- Common symptoms may include the Check Engine light illuminating, reduced engine performance, and possible failed emissions testing.

2. What are the possible causes of the P2207 code in a 2014 GMC Sierra?

- The code P2207 can be triggered by a faulty NOx sensor 1, issues with the heater control circuit, damaged wiring, or a problem with the vehicle's ECM.

3. How can I diagnose the NOx Sensor 1 Heater Control Circuit High Voltage issue in my 2014 GMC Sierra?

- Diagnosing the problem typically involves using an OBDII scanner to read the code, inspecting the wiring for damage, testing the NOx sensor 1 and its heater control circuit, and checking the ECM.

4. Is it safe to continue driving my 2014 GMC Sierra with the P2207 code related to the NOx sensor heater circuit issue?

- While driving with this code may be possible, it is not recommended as it can lead to decreased fuel efficiency and potential damage to the vehicle's emissions system over time.

5. Can I fix the P2207 NOx Sensor 1 Heater Control Circuit High Voltage issue in my 2014 GMC Sierra myself?

- Depending on your skill level and access to tools, you may be able to address the problem yourself by replacing the NOx sensor 1, repairing damaged wiring, or resetting the ECM. However, professional diagnosis and repair are recommended for accurate and long-lasting solutions.

6. How much does it typically cost to repair the P2207 code in a 2014 GMC Sierra at a mechanic or dealership?

- Repair costs for the NOx Sensor 1 Heater Control Circuit High Voltage issue can vary depending on the exact cause of the problem, but they may range from $200 to $600 at a mechanic or dealership.

7. Will resetting the Check Engine light make the P2207 code related to the NOx sensor heater circuit issue go away?

- Resetting the Check Engine light may temporarily clear the code, but it will not fix the underlying problem causing the P2207 issue. It is important to diagnose and repair the root cause to prevent further issues.

8. How long does it take to repair the NOx Sensor 1 Heater Control Circuit High Voltage issue in a 2014 GMC Sierra?

- The repair time can vary depending on the specific cause of the problem and the availability of parts. In general, it may take a few hours to a full day to diagnose and repair the P2207 code.

9. Can a faulty NOx sensor cause other issues in a 2014 GMC Sierra besides triggering the P2207 code?

- Yes, a faulty NOx sensor can lead to decreased fuel efficiency, increased emissions, and potential damage to the vehicle's catalytic converter if left untreated.

10. Are there any preventive measures I can take to avoid the P2207 code related to the NOx sensor heater circuit issue in my 2014 GMC Sierra?

- Regular maintenance, such as checking and replacing sensors as recommended by the manufacturer, can help prevent issues like the P2207 code. Additionally, avoiding rough driving conditions can help maintain the health of your vehicle's emissions system.