AutoCodes – Chevrolet – P2205 2014 Chevrolet Silverado

P2205 2014 Chevrolet Silverado Code - NOx Sensor 1 Heater Control 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: P2205 2014 Chevrolet Silverado indicates NOx Sensor 1 Heater Control 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 231

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
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Code P2205 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 P2205 2014 Chevrolet Silverado - NOx Sensor 1 Heater Control Circuit - AutoCodes.com — P2205 2014 Chevrolet Silverado Code - NOx Sensor 1 Heater Control Circuit

What does this mean?

What are the Possible Causes of the DTC P2205 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 P2205 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 P2205 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 P2205 2014 Chevrolet Silverado 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 P2205 2014 Chevrolet Silverado Code

What does the OBDII code P2205 indicate for a 2014 Chevrolet Silverado?

The code P2205 indicates an issue with the NOx Sensor 1 Heater Control Circuit, which affects the sensor's ability to operate properly.

What are the common symptoms of code P2205 in a 2014 Chevrolet Silverado?

Symptoms may include a check engine light, reduced engine performance, poor fuel efficiency, or issues with emissions control.

What causes the P2205 code on a 2014 Chevrolet Silverado?

Common causes include a faulty NOx sensor, damaged wiring, poor electrical connections, or a failed heater circuit within the sensor.

Can I drive my 2014 Chevrolet Silverado with the P2205 code?

While the truck may still be drivable, it could experience reduced efficiency and performance, and prolonged driving may lead to further damage or emissions compliance issues.

How do I diagnose the P2205 code on a 2014 Chevrolet Silverado?

Diagnosis involves checking the NOx sensor for damage, testing the heater circuit for continuity, inspecting wiring and connectors, and using a scan tool to monitor sensor data.

Is replacing the NOx sensor always necessary to fix code P2205?

Not necessarily; the issue could be related to wiring, connectors, or the heater circuit itself. Testing components before replacing the sensor is recommended.

How much does it cost to repair the P2205 code on a 2014 Chevrolet Silverado?

Repair costs vary but typically range from $300 to $600 for parts and labor if the NOx sensor needs replacement. Wiring repairs may cost less.

Can a faulty NOx sensor affect emissions testing?

Yes, a malfunctioning NOx sensor can cause higher emissions levels, potentially leading to a failed emissions test.

What tools are needed to fix the P2205 code on a 2014 Chevrolet Silverado?

You'll need an OBDII scan tool, a digital multimeter for testing circuits, and appropriate tools for removing and replacing the NOx sensor, if necessary.

How can I prevent the P2205 code from recurring?

Ensure regular maintenance, inspect wiring for damage, and address any warning lights promptly to prevent further issues with the NOx sensor system.