AutoCodes – Chevrolet – P2206 2018 Chevrolet Silverado

P2206 2018 Chevrolet Silverado Code - NOx Sensor 1 Heater Control Circuit Low 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: P2206 2018 Chevrolet Silverado indicates NOx Sensor 1 Heater Control Circuit Low 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 330

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 P2206 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 P2206 2018 Chevrolet Silverado - NOx Sensor 1 Heater Control Circuit Low Voltage - AutoCodes.com — P2206 2018 Chevrolet Silverado Code - NOx Sensor 1 Heater Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2206 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 P2206 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 P2206 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 P2206 2018 Chevrolet Silverado code?

Need more information on how to fix the P2206 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 P2206 2018 Chevrolet Silverado Code

1. What does the OBDII code P2206 on a 2018 Chevrolet Silverado indicate?

- The code P2206 indicates a fault in the NOx Sensor 1 Heater Control Circuit, specifically low voltage.

2. What are the common symptoms of a P2206 code in a 2018 Chevrolet Silverado?

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

3. What are the possible causes of a P2206 code in a 2018 Chevrolet Silverado?

- Potential causes may include a faulty NOx sensor, damaged wiring or connectors, a malfunctioning NOx sensor heater, or issues with the vehicle's ECM.

4. How serious is a P2206 fault code in a 2018 Chevrolet Silverado?

- While the vehicle may still be operational with this code, it is essential to address it promptly to prevent potential damage to the engine and ensure optimal performance.

5. How can I diagnose a P2206 code in my 2018 Chevrolet Silverado?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the NOx sensor and related components, and testing the circuit for proper voltage.

6. Can I drive my 2018 Chevrolet Silverado with a P2206 fault code?

- It is generally not recommended to drive the vehicle extensively with this fault code, as it can lead to reduced engine efficiency and possible damage over time.

7. How can I repair a P2206 fault code in a 2018 Chevrolet Silverado?

- Repair options may include replacing the NOx sensor, repairing or replacing damaged wiring, checking and replacing fuses if necessary, and resetting the fault code with a scanner.

8. Is it possible to reset a P2206 fault code in a 2018 Chevrolet Silverado without fixing the underlying issue?

- While you can clear the fault code with an OBDII scanner, it is crucial to address the root cause of the problem to prevent the code from reoccurring.

9. How much does it typically cost to repair a P2206 fault code in a 2018 Chevrolet Silverado?

- The cost of repair can vary depending on the specific issue causing the fault code, but it may range from a few hundred to over a thousand dollars, including parts and labor.

10. Can a DIY enthusiast fix a P2206 fault code in a 2018 Chevrolet Silverado?

- While some may be able to diagnose and address simpler issues like damaged wiring, replacing the NOx sensor or dealing with more complex problems may require professional expertise.