AutoCodes – Chevrolet – P2209 2017 Chevrolet Silverado

P2209 2017 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 2017 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 311

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 2017 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 2017 Chevrolet Silverado - NOx Sensor 1 Heater Control Circuit - AutoCodes.com — P2209 2017 Chevrolet Silverado Code - NOx Sensor 1 Heater Control Circuit

What does this mean?

What are the Possible Causes of the DTC P2209 2017 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 2017 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 2017 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 2017 Chevrolet Silverado code?

Need more information on how to fix the P2209 2017 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 P2209 2017 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P2209 in a 2017 Chevrolet Silverado?

- Common symptoms include the Check Engine light illuminating, reduced engine performance, and potential failures to pass emissions tests.

2. What does the OBDII code P2209 on a 2017 Chevrolet Silverado indicate?

- The code P2209 refers to an issue with the NOx Sensor 1 Heater Control Circuit in the vehicle's emission control system.

3. What are the possible causes of OBDII code P2209 in a 2017 Chevrolet Silverado?

- Possible causes include a faulty NOx sensor, damaged wiring or connectors in the heater circuit, or a malfunctioning powertrain control module (PCM).

4. How can I diagnose and repair OBDII code P2209 in a 2017 Chevrolet Silverado?

- Diagnosis typically involves inspecting the NOx sensor and its wiring for damage or corrosion. Repair may involve replacing the sensor, repairing wiring, or reprogramming the PCM.

5. Can I drive my 2017 Chevrolet Silverado with the OBDII code P2209 illuminated?

- It is not recommended to drive the vehicle with the code P2209 illuminated, as it can lead to reduced fuel efficiency and potential damage to the catalytic converter.

6. Will OBDII code P2209 on a 2017 Chevrolet Silverado cause permanent engine damage?

- While the code itself may not cause immediate engine damage, ignoring the issue can lead to long-term problems with emissions control and engine performance.

7. How much does it typically cost to repair OBDII code P2209 in a 2017 Chevrolet Silverado?

- The cost of repair can vary depending on the exact cause of the issue, but it may range from $200 to $500, including parts and labor.

8. Can I reset the Check Engine light after repairing OBDII code P2209 in my 2017 Chevrolet Silverado?

- Yes, the Check Engine light can be reset using an OBDII scanner after the repair has been completed to clear the code P2209.

9. Is it possible to prevent OBDII code P2209 from recurring in my 2017 Chevrolet Silverado?

- Regular maintenance, such as keeping the engine well-tuned and ensuring proper sensor function, can help reduce the risk of code P2209 reappearing.

10. How long does it take to repair OBDII code P2209 in a 2017 Chevrolet Silverado?

- The repair time can vary based on the exact issue and the repair process needed, but it typically takes a few hours to complete the diagnosis and repair successfully.