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AutoCodes – Chevrolet – P2207 2018 Chevrolet Silverado

P2207 2018 Chevrolet Silverado Code - NOx Sensor 1 Heater Control Circuit High Voltage

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
P2207 2018 Chevrolet Silverado indicates NOx Sensor 1 Heater Control Circuit High Voltage.
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 202
How popular is this code, among other codes? Low
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Table of contents Created and updated by William Orellana on Mar 24, 2024
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Code P2207 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 P2207 2018 Chevrolet Silverado - NOx Sensor 1 Heater Control Circuit High Voltage - AutoCodes.com
P2207 2018 Chevrolet Silverado Code - NOx Sensor 1 Heater Control Circuit High Voltage
What does this mean?

What are the Possible Causes of the DTC P2207 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 P2207 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 P2207 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 P2207 2018 Chevrolet Silverado code?

Need more information on how to fix the P2207 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 P2207 2018 Chevrolet Silverado Code

1. What does the OBDII code P2207 mean on a 2018 Chevrolet Silverado?

The code P2207 indicates a problem with the NOx sensor 1 heater control circuit, specifically detecting high voltage.

2. What are common symptoms of code P2207 in a 2018 Chevrolet Silverado?

Symptoms may include reduced fuel efficiency, a check engine light, poor engine performance, and potential emissions test failure.

3. What causes code P2207 on a 2018 Chevrolet Silverado?

Common causes include a faulty NOx sensor, damaged wiring, connector issues, or a malfunctioning engine control module (ECM).

4. Can I drive my 2018 Chevrolet Silverado with code P2207?

While the truck may still be drivable, ignoring the code can lead to increased emissions, reduced performance, and potential damage to the catalytic converter.

5. How is code P2207 diagnosed on a 2018 Chevrolet Silverado?

A mechanic will inspect the NOx sensor, wiring harness, and connectors, and use a scan tool to perform live data analysis and circuit testing.

6. How do you fix code P2207 in a 2018 Chevrolet Silverado?

Repairs may involve replacing the NOx sensor, repairing or replacing damaged wiring, cleaning connectors, or reprogramming the ECM.

7. What is the function of NOx sensor 1 in a 2018 Chevrolet Silverado?

NOx sensor 1 monitors nitrogen oxide levels in the exhaust to ensure proper emissions control and compliance with environmental standards.

8. How much does it cost to repair code P2207 on a 2018 Chevrolet Silverado?

Repair costs vary, but replacing the NOx sensor typically ranges from $300 to $800, depending on parts and labor.

9. Can a faulty NOx sensor cause other problems in a 2018 Chevrolet Silverado?

Yes, a faulty NOx sensor can lead to increased emissions, reduced engine efficiency, and potential damage to the emissions system.

10. Does clearing the P2207 code fix the issue on a 2018 Chevrolet Silverado?

Clearing the code may turn off the check engine light temporarily, but the underlying issue must be resolved to prevent the code from returning.

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