AutoCodes – Chevrolet – P2205 2018 Chevrolet Silverado

P2205 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 316

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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado - NOx Sensor 1 Heater Control Circuit - AutoCodes.com — P2205 2018 Chevrolet Silverado Code - NOx Sensor 1 Heater Control Circuit

What does this mean?

What are the Possible Causes of the DTC P2205 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado code?

Need more information on how to fix the P2205 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado Code

1. What does the OBDII code P2205 on my 2018 Chevrolet Silverado mean?

The code P2205 indicates a problem with the NOx Sensor 1 Heater Control Circuit in your vehicle.

2. What are the common symptoms of a NOx Sensor 1 Heater Control Circuit issue?

Common symptoms include poor engine performance, decreased fuel efficiency, and the illumination of the check engine light on the dashboard.

3. What are the possible causes of the P2205 code on a 2018 Chevrolet Silverado?

Potential causes include a faulty NOx sensor, damaged wiring or connectors, a blown fuse, or issues with the vehicle's engine control module.

4. How serious is the P2205 OBDII code on my Chevrolet Silverado?

While the vehicle may still be driveable with this code, it is essential to address the issue promptly to prevent potential damage to the vehicle's emissions system and ensure optimal engine performance.

5. Can I continue driving my 2018 Chevrolet Silverado with the P2205 code?

It is recommended to avoid extended driving with the P2205 code present to prevent further damage and to have the issue diagnosed and repaired as soon as possible.

6. How can I diagnose and repair a NOx Sensor 1 Heater Control Circuit problem on my Silverado?

Diagnosis typically involves checking the sensor, wiring, and related components for damage or malfunction. Repairs may involve replacing the sensor, repairing wiring, or addressing issues with the engine control module.

7. Can I fix the NOx Sensor 1 Heater Control Circuit issue in my Silverado myself?

While some DIY enthusiasts may be able to address this issue, it is recommended to have a qualified mechanic diagnose and repair the problem to ensure it is properly resolved.

8. Are there any maintenance tips to prevent the P2205 code from reoccurring?

Regular maintenance of the vehicle, including checking the NOx sensor and related components during scheduled service intervals, can help prevent issues that may trigger the P2205 code.

9. How much does it cost to repair a NOx Sensor 1 Heater Control Circuit problem on a 2018 Chevrolet Silverado?

The cost of repairs can vary depending on the extent of the issue, the parts needed, and labor costs. It is advisable to obtain quotes from reputable mechanics or dealerships for an accurate estimate.

10. Will resetting the check engine light make the P2205 code disappear permanently?

Simply resetting the check engine light will not fix the underlying issue causing the P2205 code. It is crucial to diagnose the problem, address the root cause, and ensure the code does not reappear.