AutoCodes – Chevrolet – P2208 2016 Chevrolet Silverado

P2208 2016 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 2016 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 270

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 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 P2208 2016 Chevrolet Silverado - NOx Sensor 1 Heater Feedback Circuit - AutoCodes.com — P2208 2016 Chevrolet Silverado Code - NOx Sensor 1 Heater Feedback Circuit

What does this mean?

What are the Possible Causes of the DTC P2208 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 P2208 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 P2208 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 P2208 2016 Chevrolet Silverado code?

Need more information on how to fix the P2208 2016 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 2016 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P2208 in a 2016 Chevrolet Silverado related to the NOx Sensor 1 Heater Feedback Circuit?

- Common symptoms include the illumination of the check engine light, reduced engine performance, and potential failure to pass emissions tests.

2. What are the possible causes of OBDII code P2208 in a 2016 Chevrolet Silverado?

- The code P2208 is typically triggered by issues with the NOx Sensor 1 Heater Feedback Circuit, which can be caused by a faulty NOx sensor, wiring issues, or a malfunctioning heater element.

3. How can I diagnose the NOx Sensor 1 Heater Feedback Circuit issue triggering code P2208 in my 2016 Chevrolet Silverado?

- Diagnosis involves using an OBDII scanner to retrieve the specific fault code, inspecting the wiring and connections related to the NOx sensor, and testing the sensor and heater element for proper functionality.

4. Is it safe to continue driving my 2016 Chevrolet Silverado with OBDII code P2208 related to the NOx Sensor 1 Heater Feedback Circuit issue?

- It is generally not recommended to continue driving the vehicle with this code present, as it can lead to further damage to the emissions system and potentially affect engine performance.

5. Can I repair the NOx Sensor 1 Heater Feedback Circuit issue triggering code P2208 in my 2016 Chevrolet Silverado myself?

- While some DIY enthusiasts may attempt the repair, it is recommended to have a professional technician diagnose and repair the issue to ensure proper resolution and prevent further complications.

6. How much does it typically cost to repair the NOx Sensor 1 Heater Feedback Circuit issue causing OBDII code P2208 in a 2016 Chevrolet Silverado?

- Repair costs can vary depending on the extent of the issue and whether the sensor, wiring, or heater element needs to be replaced. Costs typically range from $200 to $600, including parts and labor.

7. Are there any preventive maintenance measures I can take to avoid OBDII code P2208 related to the NOx Sensor 1 Heater Feedback Circuit in my 2016 Chevrolet Silverado?

- Regularly servicing the vehicle according to the manufacturer's recommendations, including monitoring the health of the emissions system, can help prevent issues that may trigger this code.

8. Will resetting the check engine light make OBDII code P2208 related to the NOx Sensor 1 Heater Feedback Circuit go away in my 2016 Chevrolet Silverado?

- Resetting the check engine light may temporarily clear the code, but if the underlying issue causing the code is not addressed, the light will likely come back on after some driving cycles.

9. Can a faulty NOx sensor cause other problems in my 2016 Chevrolet Silverado besides triggering OBDII code P2208?

- Yes, a faulty NOx sensor can impact the vehicle's emissions, fuel efficiency, and overall engine performance, making it important to address issues promptly.

10. How long does it typically take to repair the NOx Sensor 1 Heater Feedback Circuit issue causing OBDII code P2208 in a 2016 Chevrolet Silverado?

- The repair time can vary depending on the exact cause of the issue and the availability of parts. In general, it may take a few hours to a full day to diagnose and repair the problem.