AutoCodes – Chevrolet – P20BC 2015 Chevrolet Silverado

P20BC 2015 Chevrolet Silverado Code - Reductant Heater 1 Control Circuit High Voltage

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: P20BC 2015 Chevrolet Silverado indicates Reductant Heater 1 Control Circuit High Voltage.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 310

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
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P20BC 2015 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 tank heater control circuit is shorted to a voltage for greater than 4 s.

OBDII Code P20BC 2015 Chevrolet Silverado - Reductant Heater 1 Control Circuit High Voltage - AutoCodes.com — P20BC 2015 Chevrolet Silverado Code - Reductant Heater 1 Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P20BC 2015 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 P20BC 2015 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 P20BC 2015 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 P20BC 2015 Chevrolet Silverado code?

Need more information on how to fix the P20BC 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P20BC 2015 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 P20BC 2015 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P20BC on a 2015 Chevrolet Silverado?

The common symptoms of OBDII code P20BC 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 P20BC indicate in a 2015 Chevrolet Silverado?

OBDII code P20BC indicates a problem with the Reductant Heater 1 Control Circuit High Voltage in the emissions system of a 2015 Chevrolet Silverado.

3. What are the possible causes of OBDII code P20BC on a 2015 Chevrolet Silverado?

Possible causes of OBDII code P20BC include a faulty reductant heater, damaged wiring or connectors in the control circuit, or issues with the engine control module.

4. How can I diagnose the OBDII code P20BC on my 2015 Chevrolet Silverado?

Diagnosing OBDII code P20BC typically involves using a scan tool to retrieve the fault code, checking the wiring and connectors for damage, and testing the reductant heater for proper function.

5. Can I continue driving my 2015 Chevrolet Silverado with OBDII code P20BC?

It is not recommended to continue driving a vehicle with OBDII code P20BC, as it can lead to reduced engine performance and potential damage to the emissions system.

6. How can I repair OBDII code P20BC on a 2015 Chevrolet Silverado?

Repairing OBDII code P20BC may involve replacing the reductant heater, repairing any damaged wiring or connectors, or resetting the engine control module after addressing the issue.

7. Is it possible to clear OBDII code P20BC on a 2015 Chevrolet Silverado without fixing the underlying problem?

Clearing OBDII code P20BC without fixing the underlying issue is not recommended, as the problem will likely persist and trigger the check engine light again.

8. Can a DIY enthusiast fix OBDII code P20BC on a 2015 Chevrolet Silverado?

A DIY enthusiast with the necessary tools and knowledge of automotive systems may be able to diagnose and repair OBDII code P20BC, but professional assistance is recommended for accurate and thorough repairs.

9. How much does it typically cost to repair OBDII code P20BC on a 2015 Chevrolet Silverado?

The cost of repairing OBDII code P20BC on a 2015 Chevrolet Silverado can vary depending on the exact cause of the issue, but it may involve parts and labor costs ranging from $200 to $500 or more.

10. Will fixing OBDII code P20BC on my 2015 Chevrolet Silverado improve fuel efficiency?

Fixing OBDII code P20BC can help restore optimal engine performance and emissions control, potentially leading to improved fuel efficiency in a 2015 Chevrolet Silverado.