AutoCodes – Chevrolet – P2208 2015 Chevrolet Silverado

P2208 2015 Chevrolet Silverado Code - NOx Sensor 1 Heater Feedback 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: P2208 2015 Chevrolet Silverado indicates NOx Sensor 1 Heater Feedback 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 205

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 P2208 2015 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 P2208 2015 Chevrolet Silverado - NOx Sensor 1 Heater Feedback Circuit - AutoCodes.com — P2208 2015 Chevrolet Silverado Code - NOx Sensor 1 Heater Feedback Circuit

What does this mean?

What are the Possible Causes of the DTC P2208 2015 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 P2208 2015 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 P2208 2015 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 P2208 2015 Chevrolet Silverado code?

Need more information on how to fix the P2208 2015 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 P2208 2015 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P2208 in a 2015 Chevrolet Silverado?

- Common symptoms include the illumination of the check engine light, reduced engine performance, and potential failed emissions testing.

2. What does the OBDII code P2208 indicate in a 2015 Chevrolet Silverado?

- This code indicates an issue with the NOx Sensor 1 heater feedback circuit in the vehicle.

3. What are the possible causes of the NOx Sensor 1 Heater Feedback Circuit issue in a 2015 Chevrolet Silverado?

- Possible causes include a faulty NOx sensor, damaged wiring or connectors, a blown fuse, or a malfunctioning engine control module.

4. How can I diagnose the NOx Sensor 1 Heater Feedback Circuit problem in my 2015 Chevrolet Silverado?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific fault code, inspecting the sensor and associated wiring for damage, and testing the sensor's functionality.

5. Can I continue driving my 2015 Chevrolet Silverado with OBDII code P2208 active?

- It's not recommended to drive with this code active, as it can lead to increased emissions, reduced fuel efficiency, and potential engine damage if left unresolved.

6. What are the repair options for resolving OBDII code P2208 in a 2015 Chevrolet Silverado?

- Repair options include replacing the NOx sensor, repairing damaged wiring or connectors, checking and replacing fuses if necessary, or reprogramming the engine control module.

7. How much does it typically cost to fix the NOx Sensor 1 Heater Feedback Circuit issue in a 2015 Chevrolet Silverado?

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

8. Is it possible to reset the OBDII code P2208 in a 2015 Chevrolet Silverado without fixing the underlying issue?

- While you can clear the code with an OBDII scanner, it will likely reappear if the underlying problem is not addressed.

9. Can a DIY enthusiast fix the NOx Sensor 1 Heater Feedback Circuit problem in a 2015 Chevrolet Silverado?

- Depending on the skill level and tools available, some DIY enthusiasts may be able to replace the NOx sensor or address simple wiring issues, but more complex repairs may require professional assistance.

10. How often does the NOx Sensor 1 Heater Feedback Circuit issue occur in 2015 Chevrolet Silverado vehicles?

- While it's not one of the most common issues, it can still occur due to sensor wear, wiring issues, or electrical system faults. Regular maintenance and prompt repairs can help prevent this problem.