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P11D3 2016 Chevrolet Silverado Code - NOx Sensor 1 Exceeded Minimum Learning Limit

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
P11D3 2016 Chevrolet Silverado indicates NOx Sensor 1 Exceeded Minimum Learning Limit.
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 183
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 P11D3 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 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 P11D3 2016 Chevrolet Silverado - NOx Sensor 1 Exceeded Minimum Learning Limit - AutoCodes.com
P11D3 2016 Chevrolet Silverado Code - NOx Sensor 1 Exceeded Minimum Learning Limit
What does this mean?

What are the Possible Causes of the DTC P11D3 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 P11D3 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 P11D3 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 P11D3 2016 Chevrolet Silverado code?

Need more information on how to fix the P11D3 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P11D3 2016 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 P11D3 2016 Chevrolet Silverado Code

1. What does the OBDII code P11D3 mean for a 2016 Chevrolet Silverado?

The code P11D3 indicates that NOx Sensor 1 has exceeded its minimum learning limit, meaning the sensor is detecting values outside of expected parameters.

2. What are the symptoms of code P11D3 in a 2016 Chevrolet Silverado?

Common symptoms include reduced engine performance, poor fuel efficiency, an illuminated check engine light, and possible activation of limp mode.

3. What causes the P11D3 code to appear in a 2016 Chevrolet Silverado?

The code is typically caused by a malfunctioning NOx sensor, wiring or connector issues, ECU software problems, or excessive exhaust emissions due to engine issues.

4. Can driving with code P11D3 damage my Chevrolet Silverado?

Driving with this code for extended periods may lead to reduced fuel economy, increased emissions, and potential damage to the emissions system.

5. How is the NOx Sensor 1 related to the P11D3 code?

NOx Sensor 1 measures nitrogen oxide levels in the exhaust and helps regulate the emissions system. A failure in this sensor can trigger the P11D3 code.

6. How do I diagnose the P11D3 code in my 2016 Chevrolet Silverado?

Use an OBDII scanner to confirm the code, inspect the NOx sensor and related wiring for damage, and check for exhaust leaks or engine performance issues.

7. How do I fix code P11D3 on a 2016 Chevrolet Silverado?

Repairs may include replacing the NOx sensor, fixing damaged wiring, updating ECU software, or addressing underlying engine problems affecting emissions.

8. How much does it cost to repair the P11D3 code?

The cost of repairs varies but replacing a NOx sensor can range from $300 to $600, depending on labor costs and parts prices.

9. Can I reset the P11D3 code without fixing the problem?

While you can clear the code with an OBDII scanner, it will likely return unless the underlying issue is resolved.

10. Is code P11D3 covered under warranty for a 2016 Chevrolet Silverado?

If your vehicle is still under emissions warranty, the repair may be covered. Check with your dealership for details on coverage.

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