AutoCodes – Chevrolet – P20BD 2018 Chevrolet Silverado

P20BD 2018 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 2018 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 536

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 29, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
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Code P20BD 2018 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 2018 Chevrolet Silverado - Reductant Heater 2 Control Circuit - AutoCodes.com — P20BD 2018 Chevrolet Silverado Code - Reductant Heater 2 Control Circuit

What does this mean?

What are the Possible Causes of the DTC P20BD 2018 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 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 P20BD 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 P20BD 2018 Chevrolet Silverado code?

Need more information on how to fix the P20BD 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P20BD 2018 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 P20BD 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P20BD in a 2018 Chevrolet Silverado?

The common symptoms of OBDII code P20BD in a 2018 Chevrolet Silverado may include the Check Engine Light coming on, reduced engine power, and potential issues with the vehicle's emissions system.

2. What does the OBDII code P20BD in a 2018 Chevrolet Silverado indicate?

OBDII code P20BD in a 2018 Chevrolet Silverado indicates a problem with the Reductant Heater 2 Control Circuit, specifically related to the reductant heater system in the vehicle's emissions control system.

3. What are the possible causes of OBDII code P20BD in a 2018 Chevrolet Silverado?

Possible causes of OBDII code P20BD in a 2018 Chevrolet Silverado include a faulty reductant heater 2 control circuit, damaged wiring or connectors, a defective reductant heater, or issues with the powertrain control module (PCM).

4. How can I diagnose the OBDII code P20BD in my 2018 Chevrolet Silverado?

Diagnosing OBDII code P20BD in a 2018 Chevrolet Silverado typically involves using an OBDII scanner to retrieve the code, inspecting the reductant heater system components, checking for any visible damage or corrosion, and testing the circuit for proper voltage and continuity.

5. Can I continue to drive my 2018 Chevrolet Silverado with OBDII code P20BD?

It is not recommended to continue driving your 2018 Chevrolet Silverado with OBDII code P20BD, as it can cause damage to the emissions control system and potentially lead to reduced engine performance. It is best to address the issue promptly.

6. How can I repair OBDII code P20BD in my 2018 Chevrolet Silverado?

Repairing OBDII code P20BD in a 2018 Chevrolet Silverado may involve replacing the faulty reductant heater 2 control circuit, repairing damaged wiring or connectors, replacing the reductant heater if necessary, and clearing the trouble code with an OBDII scanner.

7. Is it possible to prevent OBDII code P20BD from occurring in my 2018 Chevrolet Silverado?

While some causes of OBDII code P20BD may be due to normal wear and tear, you can help prevent this issue by ensuring regular maintenance of your vehicle's emissions system, checking for any signs of damage or corrosion, and addressing any related trouble codes promptly.

8. How much does it cost to repair OBDII code P20BD in a 2018 Chevrolet Silverado?

The cost to repair OBDII code P20BD in a 2018 Chevrolet Silverado can vary depending on the specific cause of the issue, labor rates in your area, and whether any parts need to be replaced. It is recommended to consult a professional mechanic for an accurate estimate.

9. Can I reset the Check Engine Light after repairing OBDII code P20BD in my 2018 Chevrolet Silverado?

After repairing OBDII code P20BD in a 2018 Chevrolet Silverado, you can reset the Check Engine Light using an OBDII scanner. This will clear the trouble code from the vehicle's memory and turn off the warning light on the dashboard.

10. Will OBDII code P20BD in a 2018 Chevrolet Silverado affect the vehicle's fuel efficiency?

OBDII code P20BD in a 2018 Chevrolet Silverado may affect the vehicle's fuel efficiency if left unaddressed, as it can impact the proper functioning of the emissions control system. Resolving the issue promptly can help maintain optimal fuel efficiency.