AutoCodes – GMC – P2205 2015 GMC Sierra

P2205 2015 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 2015 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

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)

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P2205 2015 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 2015 GMC Sierra - NOx Sensor 1 Heater Control Circuit - AutoCodes.com — P2205 2015 GMC Sierra Code - NOx Sensor 1 Heater Control Circuit

What does this mean?

What are the Possible Causes of the DTC P2205 2015 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 2015 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 2015 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 2015 GMC Sierra code?

Need more information on how to fix the P2205 2015 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2205 2015 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 2015 GMC Sierra Code

1. What does the OBDII code P2205 on a 2015 GMC Sierra mean?

The P2205 code indicates a fault in the NOx Sensor 1 Heater Control Circuit in the vehicle's emissions control system.

2. What are the common symptoms of a P2205 code in a 2015 GMC Sierra?

Common symptoms of a P2205 code may include reduced fuel efficiency, engine performance issues, and the illumination of the check engine light.

3. What are possible causes of the P2205 code in a 2015 GMC Sierra?

Potential causes of a P2205 code include a faulty NOx sensor, wiring issues in the sensor circuit, or a malfunction in the sensor heater control circuit.

4. How serious is a P2205 fault code on a 2015 GMC Sierra?

While a P2205 code may not cause immediate drivability issues, it can lead to increased emissions and may affect the vehicle's overall performance over time if not addressed.

5. Can I continue driving my 2015 GMC Sierra with a P2205 code?

It is generally not recommended to ignore a P2205 code, as it can impact the vehicle's emissions output and long-term performance. It is advisable to address the issue promptly.

6. How can I diagnose a P2205 code on my 2015 GMC Sierra?

Diagnosing a P2205 code typically involves using an OBDII scanner to retrieve the specific fault code, inspecting the NOx sensor and related wiring, and testing the sensor heater circuit for proper operation.

7. What are some repair tips for fixing a P2205 code on a 2015 GMC Sierra?

Repairing a P2205 code may involve replacing the NOx sensor, repairing damaged wiring, or addressing issues with the sensor heater control circuit. It is recommended to follow manufacturer guidelines for proper repair procedures.

8. Can I reset the check engine light after fixing a P2205 fault on my 2015 GMC Sierra?

Once the underlying issue causing the P2205 code has been resolved, the check engine light can be reset using an OBDII scanner to clear the fault code and turn off the warning light.

9. How much does it cost to repair a P2205 fault on a 2015 GMC Sierra?

The cost of repairing a P2205 fault can vary depending on the specific cause of the issue, the labor rates in your area, and whether you choose to address the problem yourself or take the vehicle to a professional mechanic.

10. Will a P2205 code on a 2015 GMC Sierra affect the vehicle's emissions inspection?

A P2205 code may cause the vehicle to fail an emissions inspection, as it indicates a problem with the emissions control system. It is advisable to address the issue before undergoing an emissions test.