AutoCodesChevrolet – P20BD 2017 Chevrolet Silverado

P20BD 2017 Chevrolet Silverado Code - Reductant Heater 2 Control Circuit

Quick Answer

As reductant will freeze at temperatures below -11°C (12°F), there are 2 reductant heaters located in the reductant tank. Common causes include Faulty Reductant Heater, Reductant Heater harness is open or shorted, Reductant Heater 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
P20BD 2017 Chevrolet Silverado indicates Reductant Heater 2 Control Circuit.
Common causes
Common causes include Faulty Reductant Heater, Reductant Heater harness is open or shorted, Reductant Heater 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 445
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 29, 2022
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Code P20BD 2017 Chevrolet Silverado Description

As reductant will freeze at temperatures below -11°C (12°F), there are 2 reductant heaters located in the reductant tank. One heats the reductant in the tank, and one heats the reductant supplied to the reductant injector supply pipe. The Engine Control Module (ECM) monitors the reductant temperature in the tank in order to determine if the reductant temperature is below its freeze point. If the ECM determines that the reductant may be frozen, it activates a "defrost strategy" energizing the reductant eater. This energizing action terminates when the temperature sensor measures a threshold value over which the heater must be deactivated.
The Diagnostic Trouble Code (DTC) will be set when the ECM indicates the reductant line heater control circuit is open for greater than 4 s.
OBDII Code P20BD 2017 Chevrolet Silverado - Reductant Heater 2 Control Circuit - AutoCodes.com
P20BD 2017 Chevrolet Silverado Code - Reductant Heater 2 Control Circuit

What are the Possible Causes of the DTC P20BD 2017 Chevrolet Silverado?

  • Faulty Reductant Heater
  • Reductant Heater harness is open or shorted
  • Reductant Heater circuit poor electrical connection
  • Faulty Reductant Pump and Sensor Assembly
  • Faulty Reductant Control Module

How to Fix the DTC P20BD 2017 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 P20BD 2017 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 P20BD 2017 Chevrolet Silverado code?

Need more information on how to fix the P20BD 2017 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 P20BD 2017 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P20BD in a 2017 Chevrolet Silverado?

The common symptoms of OBDII code P20BD (Reductant Heater 2 Control Circuit) in a 2017 Chevrolet Silverado may include the illumination of the Check Engine Light, reduced engine performance, and possible failsafe mode activation.

2. What causes OBDII code P20BD in a 2017 Chevrolet Silverado?

The P20BD code in a 2017 Chevrolet Silverado is typically caused by a malfunction in the reductant heater 2 control circuit, which may be due to a faulty heater, wiring issues, or a defective control module.

3. How can I diagnose OBDII code P20BD in my 2017 Chevrolet Silverado?

Diagnosing OBDII code P20BD involves using a diagnostic scanner to retrieve the specific fault code, then inspecting the reductant heater 2 circuit components, such as the heater itself, wiring connections, and the control module, to identify the root cause of the issue.

4. Can I continue to drive my 2017 Chevrolet Silverado with OBDII code P20BD?

It is not recommended to drive your 2017 Chevrolet Silverado with an unresolved P20BD code, as it can lead to reduced engine performance and potential emissions compliance issues. It is advisable to address the problem promptly.

5. How can I repair OBDII code P20BD in my 2017 Chevrolet Silverado?

Repairing OBDII code P20BD in a 2017 Chevrolet Silverado often involves replacing the faulty reductant heater 2, repairing any damaged wiring, or addressing issues with the control module. It is recommended to follow the manufacturer's diagnostic and repair procedures.

6. Is OBDII code P20BD a serious issue in a 2017 Chevrolet Silverado?

While OBDII code P20BD (Reductant Heater 2 Control Circuit) in a 2017 Chevrolet Silverado may not cause immediate drivability issues, it can affect emissions compliance and engine performance over time if left unresolved. It is best to address the problem to maintain optimal vehicle operation.

7. Can a DIY enthusiast fix OBDII code P20BD in a 2017 Chevrolet Silverado?

Depending on your skill level and access to tools, a DIY enthusiast may be able to address OBDII code P20BD in a 2017 Chevrolet Silverado by following the manufacturer's repair guidelines. However, complex electrical issues may require professional assistance.

8. How long does it take to repair OBDII code P20BD in a 2017 Chevrolet Silverado?

The time required to repair OBDII code P20BD in a 2017 Chevrolet Silverado can vary depending on the exact cause of the issue and the repair process involved. It may take a few hours to a full day, depending on the complexity of the repair.

9. Can resetting the OBDII code P20BD in a 2017 Chevrolet Silverado make it go away permanently?

Resetting the OBDII code P20BD in a 2017 Chevrolet Silverado may temporarily turn off the Check Engine Light, but if the underlying issue is not addressed, the code is likely to reappear. It is essential to diagnose and repair the root cause of the problem for a permanent solution.

10. Is OBDII code P20BD covered under warranty for a 2017 Chevrolet Silverado?

Depending on the specific warranty coverage and terms provided by Chevrolet, OBDII code P20BD (Reductant Heater 2 Control Circuit) may be covered under certain warranty programs for the 2017 Silverado. Contact your local dealership or refer to your warranty documentation for more information.

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