AutoCodes – GMC – P2205 2014 GMC Sierra

P2205 2014 GMC Sierra Code - NOx Sensor 1 Heater Control Circuit

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: P2205 2014 GMC Sierra indicates NOx Sensor 1 Heater Control Circuit.
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 271

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 P2205 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 P2205 2014 GMC Sierra - NOx Sensor 1 Heater Control Circuit - AutoCodes.com — P2205 2014 GMC Sierra Code - NOx Sensor 1 Heater Control Circuit

What does this mean?

What are the Possible Causes of the DTC P2205 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 P2205 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 P2205 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 P2205 2014 GMC Sierra code?

Need more information on how to fix the P2205 2014 GMC Sierra 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 P2205 2014 GMC Sierra Code

1. What does OBDII code P2205 on my 2014 GMC Sierra mean?

Code P2205 indicates a malfunction in the NOx sensor 1 heater control circuit.

2. What are the common symptoms of a P2205 code in a GMC Sierra?

Common symptoms include the illumination of the Check Engine Light, reduced fuel efficiency, and potential issues with emissions.

3. What can cause the P2205 NOx sensor 1 heater control circuit code on a 2014 GMC Sierra?

Possible causes include a faulty NOx sensor, damaged wiring or connectors, a blown fuse, or a problem with the sensor's heater circuit.

4. How serious is the P2205 OBDII code in a 2014 GMC Sierra?

While the vehicle may still be operable with this code, it is important to address it promptly to prevent potential damage to the emissions control system and ensure optimal engine performance.

5. Can I continue driving my GMC Sierra with the P2205 code?

It is generally not recommended to drive the vehicle for an extended period with an unresolved P2205 code, as it may lead to increased emissions and decreased fuel efficiency.

6. How can I diagnose and repair the P2205 NOx sensor 1 heater control circuit code on my GMC Sierra?

Diagnosis typically involves checking the sensor's wiring, connectors, and heater circuit for faults. Repair may involve replacing the NOx sensor, repairing damaged wiring, or addressing fuse issues.

7. Is it possible to reset the P2205 code on my 2014 GMC Sierra without fixing the underlying issue?

While clearing the code may temporarily turn off the Check Engine Light, the issue causing the code will persist and may lead to further problems if left unresolved.

8. Can a DIY enthusiast fix the P2205 NOx sensor code on a GMC Sierra?

Depending on your skill level and access to tools, you may be able to diagnose and repair the issue yourself. However, working with sensors and electrical components can be challenging, so professional assistance is often recommended.

9. Are there any preventive measures to avoid the P2205 code in the future?

Regular maintenance, such as checking and replacing sensors as needed, inspecting wiring for damage, and ensuring proper electrical connections, can help prevent the recurrence of the P2205 code.

10. How much can I expect to pay for repairing the P2205 NOx sensor 1 heater control circuit code on my 2014 GMC Sierra?

The cost of repair can vary depending on the exact cause of the issue, labor rates in your area, and whether you choose to address the problem yourself or take it to a mechanic. It's advisable to get quotes from reputable repair shops for an accurate estimate.