AutoCodes – Chevrolet – P2208 2018 Chevrolet Silverado

P2208 2018 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 2018 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 211

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 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 P2208 2018 Chevrolet Silverado - NOx Sensor 1 Heater Feedback Circuit - AutoCodes.com — P2208 2018 Chevrolet Silverado Code - NOx Sensor 1 Heater Feedback Circuit

What does this mean?

What are the Possible Causes of the DTC P2208 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 P2208 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 P2208 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 P2208 2018 Chevrolet Silverado code?

Need more information on how to fix the P2208 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 P2208 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P2208 in a 2018 Chevrolet Silverado?

The common symptoms of OBDII code P2208 in a 2018 Chevrolet Silverado may include the check engine light illuminating, decreased fuel efficiency, and potential engine performance issues.

2. What does the NOx Sensor 1 Heater Feedback Circuit do in a 2018 Chevrolet Silverado?

The NOx Sensor 1 Heater Feedback Circuit in a 2018 Chevrolet Silverado is responsible for monitoring and regulating the NOx (nitrogen oxide) levels in the exhaust system to ensure compliance with emissions standards.

3. What are the potential causes of OBDII code P2208 in a 2018 Chevrolet Silverado?

Potential causes of OBDII code P2208 in a 2018 Chevrolet Silverado can include a faulty NOx sensor, damaged wiring or connectors in the sensor circuit, or issues with the sensor heater element.

4. How can I diagnose OBDII code P2208 in my 2018 Chevrolet Silverado?

Diagnosing OBDII code P2208 in a 2018 Chevrolet Silverado typically involves using an OBDII scanner to retrieve the fault code, inspecting the NOx sensor and its wiring for damage, and testing the sensor's heater circuit for proper function.

5. Can I continue driving my 2018 Chevrolet Silverado with OBDII code P2208?

It is not recommended to continue driving your 2018 Chevrolet Silverado with OBDII code P2208, as it can potentially lead to increased emissions, reduced fuel efficiency, and further damage to the emissions control system.

6. How can I repair OBDII code P2208 in my 2018 Chevrolet Silverado?

Repairing OBDII code P2208 in a 2018 Chevrolet Silverado may involve replacing the faulty NOx sensor, repairing damaged wiring or connectors, or addressing issues with the sensor's heater element to restore proper functionality.

7. Is it possible to reset OBDII code P2208 in a 2018 Chevrolet Silverado without fixing the issue?

While it is possible to clear the fault code temporarily, resetting OBDII code P2208 in a 2018 Chevrolet Silverado without fixing the underlying issue will likely result in the code reappearing once the problem persists.

8. How much does it typically cost to repair OBDII code P2208 in a 2018 Chevrolet Silverado?

The cost of repairing OBDII code P2208 in a 2018 Chevrolet Silverado can vary depending on the specific issue, but it may range from around $200 to $500 or more, including parts and labor.

9. Can a DIY enthusiast fix OBDII code P2208 in a 2018 Chevrolet Silverado?

While some DIY enthusiasts may have the skills and tools to diagnose and repair OBDII code P2208 in a 2018 Chevrolet Silverado, it is recommended to consult a professional mechanic for proper diagnosis and repair to ensure the issue is resolved correctly.

10. How often does OBDII code P2208 occur in a 2018 Chevrolet Silverado?

OBDII code P2208 related to the NOx Sensor 1 Heater Feedback Circuit is not a common issue in a 2018 Chevrolet Silverado but can occur due to sensor malfunctions, wiring issues, or heating element failures.