AutoCodes – Chevrolet – P2208 2014 Chevrolet Silverado

P2208 2014 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 2014 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 265

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 2014 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 2014 Chevrolet Silverado - NOx Sensor 1 Heater Feedback Circuit - AutoCodes.com — P2208 2014 Chevrolet Silverado Code - NOx Sensor 1 Heater Feedback Circuit

What does this mean?

What are the Possible Causes of the DTC P2208 2014 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 2014 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 2014 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 2014 Chevrolet Silverado code?

Need more information on how to fix the P2208 2014 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 2014 Chevrolet Silverado Code

1. What does the OBDII code P2208 mean on a 2014 Chevrolet Silverado?

P2208 indicates an issue with the NOx Sensor 1 Heater Feedback Circuit, meaning the engine control module (ECM) has detected a problem with the heater circuit of the upstream nitrogen oxide (NOx) sensor.

2. What are the symptoms of a P2208 code on a 2014 Chevrolet Silverado?

Common symptoms include the check engine light turning on, reduced fuel efficiency, poor engine performance, and potential issues with emission control.

3. What causes the P2208 code on a 2014 Chevrolet Silverado?

Potential causes include a faulty NOx sensor, damaged or corroded wiring, a blown fuse, a malfunctioning sensor heater circuit, or a problem with the ECM.

4. Can I drive my 2014 Chevrolet Silverado with a P2208 code?

It is not recommended to continue driving with this code, as it may lead to higher emissions, reduced fuel efficiency, and potential long-term damage to the emissions system.

5. How do I diagnose the P2208 code on a 2014 Chevrolet Silverado?

Diagnose by checking for damaged wiring or connectors near the NOx sensor, testing the sensorâ€™s heater circuit for continuity, and using a scan tool to monitor sensor feedback values.

6. How do I fix the P2208 code on my 2014 Chevrolet Silverado?

Repairs may include replacing the NOx sensor, repairing or replacing damaged wiring, checking and replacing blown fuses, or reprogramming or replacing the ECM if necessary.

7. How much does it cost to repair a P2208 code on a 2014 Chevrolet Silverado?

Repair costs vary, but replacing the NOx sensor typically ranges from $300 to $700, including parts and labor. Wiring or ECM repairs may add to the cost.

8. What is the function of the NOx sensor heater in my 2014 Chevrolet Silverado?

The NOx sensor heater helps the sensor reach operating temperature quickly, allowing it to accurately measure nitrogen oxide levels in the exhaust for proper emissions control.

9. Can a faulty NOx sensor cause other problems in my 2014 Chevrolet Silverado?

Yes, a faulty NOx sensor can lead to increased emissions, reduced fuel efficiency, and potential damage to components like the catalytic converter or diesel particulate filter (DPF).

10. How can I prevent the P2208 code from occurring in my 2014 Chevrolet Silverado?

Regular maintenance, including inspecting the exhaust system, wiring, and sensors, as well as addressing check engine light issues promptly, can help prevent this code from appearing.