AutoCodes – GMC – P2205 2017 GMC Sierra

P2205 2017 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 2017 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 169

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 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 P2205 2017 GMC Sierra - NOx Sensor 1 Heater Control Circuit - AutoCodes.com — P2205 2017 GMC Sierra Code - NOx Sensor 1 Heater Control Circuit

What does this mean?

What are the Possible Causes of the DTC P2205 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 P2205 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 P2205 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 P2205 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 P2205 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P2205 in a 2017 GMC Sierra related to the NOx Sensor 1 Heater Control Circuit?

Symptoms may include the Check Engine Light being illuminated, reduced engine performance, and potential failure to pass emissions tests.

2. What could cause the NOx Sensor 1 Heater Control Circuit issue (P2205) in a 2017 GMC Sierra?

Possible causes of this code include a faulty NOx sensor, damaged wiring or connectors, a blown fuse, or a malfunctioning heater control circuit.

3. How can I diagnose the NOx Sensor 1 Heater Control Circuit problem (P2205) in my 2017 GMC Sierra?

Diagnosis involves using an OBDII scanner to retrieve the specific fault code, visually inspecting the sensor and its connections for damage, and testing the heater circuit for continuity.

4. Can I continue to drive my 2017 GMC Sierra with the P2205 code related to the NOx Sensor 1 Heater Control Circuit?

It is generally not recommended to drive the vehicle with this fault code present, as it can lead to decreased fuel efficiency and potential damage to other components.

5. What is the typical repair process for fixing OBDII code P2205 in a 2017 GMC Sierra?

Repairing this code usually involves replacing the faulty NOx sensor, repairing damaged wiring or connectors, checking and replacing fuses if necessary, and clearing the fault code from the vehicle's computer.

6. Are there any DIY tips for addressing the NOx Sensor 1 Heater Control Circuit issue (P2205) in a 2017 GMC Sierra?

While some basic diagnostics can be done at home, it is recommended to have a professional mechanic address this issue due to the complexity of the NOx sensor system.

7. How much should I expect to pay to fix the P2205 code related to the NOx Sensor 1 Heater Control Circuit in my 2017 GMC Sierra?

Costs can vary depending on the exact cause of the issue, but replacement of the NOx sensor and related repairs may range from $200 to $500 or more at a dealership or repair shop.

8. Can a faulty NOx Sensor 1 Heater Control Circuit affect the overall performance of my 2017 GMC Sierra?

Yes, a malfunctioning NOx sensor can impact the vehicle's performance, fuel efficiency, and emissions output, potentially leading to drivability issues and increased pollution.

9. How often does the NOx Sensor 1 Heater Control Circuit typically fail in a 2017 GMC Sierra?

While not extremely common, failures of the NOx sensor and its associated components can occur due to various factors such as age, mileage, and environmental conditions.

10. Is there a way to prevent the NOx Sensor 1 Heater Control Circuit issue (P2205) from occurring in my 2017 GMC Sierra?

Regular maintenance, prompt repairs of any related faults, and avoiding driving in harsh conditions can help prevent issues with the NOx sensor system and the associated P2205 fault code.