AutoCodes – Chevrolet – P2209 2016 Chevrolet Silverado

P2209 2016 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: P2209 2016 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 339

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 P2209 2016 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 P2209 2016 Chevrolet Silverado - NOx Sensor 1 Heater Control Circuit - AutoCodes.com — P2209 2016 Chevrolet Silverado Code - NOx Sensor 1 Heater Control Circuit

What does this mean?

What are the Possible Causes of the DTC P2209 2016 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 P2209 2016 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 P2209 2016 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 P2209 2016 Chevrolet Silverado 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 P2209 2016 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P2209 in a 2016 Chevrolet Silverado related to the NOx Sensor 1 Heater Control Circuit?

- Common symptoms include reduced engine performance, increased fuel consumption, and the illumination of the check engine light.

2. What are the possible causes of OBDII code P2209 in a 2016 Chevrolet Silverado?

- Possible causes include a faulty NOx sensor, damaged wiring or connectors, a blown fuse, or issues with the NOx sensor heater control circuit.

3. How can I diagnose the issue related to OBDII code P2209 in my 2016 Chevrolet Silverado?

- Diagnosing the problem may involve checking the wiring and connectors for damage, testing the NOx sensor and heater circuit for proper operation, and scanning the vehicle's computer for specific fault codes.

4. Can I continue driving my 2016 Chevrolet Silverado with OBDII code P2209 present?

- It is generally not recommended to drive with this code present, as it can lead to decreased engine performance and potential damage to the vehicle's emissions system.

5. How can I repair OBDII code P2209 in my 2016 Chevrolet Silverado?

- Repairing this code may involve replacing the NOx sensor, repairing damaged wiring or connectors, replacing a blown fuse, or addressing any issues with the NOx sensor heater control circuit.

6. Is it possible to reset OBDII code P2209 in a 2016 Chevrolet Silverado without fixing the underlying issue?

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

7. Are there any DIY tips for fixing OBDII code P2209 in a 2016 Chevrolet Silverado?

- DIY tips may include checking for loose or damaged wiring, ensuring proper connections, and replacing the NOx sensor if necessary. However, complex repairs may require professional assistance.

8. How much does it typically cost to repair OBDII code P2209 in a 2016 Chevrolet Silverado?

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

9. Can a faulty NOx sensor cause OBDII code P2209 in a 2016 Chevrolet Silverado?

- Yes, a faulty NOx sensor is a common cause of this code, as it can lead to issues with the NOx sensor heater control circuit and trigger the P2209 fault code.

10. Will OBDII code P2209 in a 2016 Chevrolet Silverado affect the vehicle's emissions testing?

- Yes, having this code present can cause the vehicle to fail emissions testing, as it indicates a problem with the NOx sensor heater control circuit, which is essential for emissions control.