AutoCodes – Chevrolet – P2208 2017 Chevrolet Silverado

P2208 2017 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 2017 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 203

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 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 P2208 2017 Chevrolet Silverado - NOx Sensor 1 Heater Feedback Circuit - AutoCodes.com — P2208 2017 Chevrolet Silverado Code - NOx Sensor 1 Heater Feedback Circuit

What does this mean?

What are the Possible Causes of the DTC P2208 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 P2208 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 P2208 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 P2208 2017 Chevrolet Silverado code?

Need more information on how to fix the P2208 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 P2208 2017 Chevrolet Silverado Code

1. What does the OBDII code P2208 mean on a 2017 Chevrolet Silverado?

The P2208 code indicates an issue with the NOx Sensor 1 Heater Feedback Circuit, which monitors the nitrogen oxide (NOx) levels in the exhaust system.

2. What are the symptoms of code P2208 in a 2017 Chevrolet Silverado?

Common symptoms include an illuminated check engine light, reduced fuel efficiency, engine performance issues, and potential limp mode activation.

3. What causes the P2208 code on a 2017 Chevrolet Silverado?

Possible causes include a faulty NOx sensor, damaged sensor wiring or connectors, a malfunctioning heater circuit, or issues with the engine control module (ECM).

4. Can I drive my 2017 Chevrolet Silverado with a P2208 code?

While the vehicle may still be drivable, ignoring this code can lead to reduced fuel efficiency, increased emissions, and potential damage to the exhaust system.

5. How do I diagnose the P2208 code on my 2017 Chevrolet Silverado?

Diagnosis involves using an OBDII scanner, inspecting the NOx sensor wiring and connectors for damage, and testing the heater circuit for proper operation.

6. How do I fix the P2208 code on my 2017 Chevrolet Silverado?

Repairs may include replacing the NOx sensor, repairing damaged wiring or connectors, or updating/reprogramming the ECM if necessary.

7. How much does it cost to fix the P2208 code on a 2017 Chevrolet Silverado?

The repair cost can range from $200 to $600, depending on whether the NOx sensor needs replacement or if additional repairs are required.

8. What is the function of the NOx sensor in my 2017 Chevrolet Silverado?

The NOx sensor measures nitrogen oxide levels in the exhaust to ensure the vehicle complies with emissions standards.

9. Can a bad NOx sensor cause other problems in my 2017 Chevrolet Silverado?

Yes, a faulty NOx sensor can lead to poor engine performance, higher emissions, and potential damage to the selective catalytic reduction (SCR) system.

10. Do I need to clear the P2208 code after repairs on my 2017 Chevrolet Silverado?

Yes, after completing the repairs, the code should be cleared using an OBDII scanner to ensure the issue is resolved and the check engine light turns off.