Engine-Codes.com
Engine-Codes – GMC – P20BF 2014 GMC Sierra

P20BF 2014 GMC Sierra Code - Reductant Heater 2 Control Circuit Low Voltage

Quick Answer

The P20BF diagnostic trouble code (DTC) for a 2014 GMC Sierra specifically relates to the Reductant Heater 2 Control Circuit Low Voltage. Common causes include Faulty reductant heater element, Damaged wiring or connectors, Defective reductant heater control module. 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
P20BF 2014 GMC Sierra indicates Reductant Heater 2 Control Circuit Low Voltage.
Common causes
Common causes include Faulty reductant heater element, Damaged wiring or connectors, Defective reductant heater control module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 15, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P20BF 2014 GMC Sierra Description

The P20BF diagnostic trouble code (DTC) for a 2014 GMC Sierra specifically relates to the Reductant Heater 2 Control Circuit Low Voltage. This code indicates that there is an issue with the control circuit for the reductant heater, which is a crucial component of the vehicle's selective catalytic reduction (SCR) system. The reductant heater is responsible for heating the diesel exhaust fluid (DEF) before it is injected into the exhaust stream to reduce harmful emissions.

OBDII Code P20BF 2014 GMC Sierra - Reductant Heater 2 Control Circuit Low Voltage
P20BF 2014 GMC Sierra Code - Reductant Heater 2 Control Circuit Low Voltage

Common Causes of P20BF 2014 GMC Sierra

  1. Faulty reductant heater element
  2. Damaged wiring or connectors
  3. Defective reductant heater control module
  4. Poor electrical connection
  5. Corrosion or moisture in the system

Symptoms of P20BF 2014 GMC Sierra

  1. Check engine light illuminated
  2. Reduced fuel efficiency
  3. Failed emissions test
  4. Decreased engine performance
  5. Rough idling or stalling

How to Fix P20BF 2014 GMC Sierra

  1. Begin by conducting a thorough inspection of the reductant heater system, checking for any visible damage or loose connections.
  2. Test the reductant heater element for continuity to determine if it is functioning properly.
  3. Inspect the wiring harness and connectors for any signs of damage or corrosion, repairing or replacing as necessary.
  4. Use a diagnostic scan tool to check for any stored fault codes and reset the system after completing repairs.
  5. Test drive the vehicle to ensure the issue has been resolved and the check engine light does not reappear.

Cost to Fix P20BF 2014 GMC Sierra

The typical repair costs for addressing a P20BF DTC related to the Reductant Heater 2 Control Circuit Low Voltage can vary depending on the extent of the issue and the specific components that require replacement. On average, the cost of parts for this repair can range from $200 to $500, with labor costs adding an additional $100 to $300. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's recommended to obtain quotes from local shops for a more accurate estimate.

Need more information about the P20BF 2014 GMC Sierra code?

Need more information on how to fix the P20BF 2014 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P20BF 2014 GMC Sierra 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 P20BF 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code P20BF in a 2014 GMC Sierra?

The common symptoms of OBDII code P20BF in a 2014 GMC Sierra include the check engine light illuminating, reduced engine performance, and potential issues with the vehicle's emission control system.

2. What does the OBDII code P20BF "Reductant Heater 2 Control Circuit Low Voltage" mean for a 2014 GMC Sierra?

The OBDII code P20BF indicates that there is a low voltage condition in the control circuit for Reductant Heater 2 in the selective catalytic reduction (SCR) system of a 2014 GMC Sierra.

3. What are the possible causes of OBDII code P20BF in a 2014 GMC Sierra?

Possible causes of OBDII code P20BF in a 2014 GMC Sierra include a faulty reductant heater 2, damaged wiring or connectors in the control circuit, a defective SCR system module, or issues with the powertrain control module (PCM).

4. How can I diagnose the OBDII code P20BF in my 2014 GMC Sierra?

Diagnosing the OBDII code P20BF in a 2014 GMC Sierra involves using an OBDII scanner to retrieve the code and then performing a thorough inspection of the reductant heater 2, its wiring, connectors, and related components to identify the root cause of the low voltage condition.

5. What are the repair options for OBDII code P20BF in a 2014 GMC Sierra?

Repair options for OBDII code P20BF in a 2014 GMC Sierra may include replacing the faulty reductant heater 2, repairing damaged wiring or connectors, replacing the SCR system module, or reprogramming the powertrain control module (PCM) if necessary.

6. Can driving with OBDII code P20BF in a 2014 GMC Sierra cause further damage?

Continuing to drive with OBDII code P20BF in a 2014 GMC Sierra may lead to reduced fuel efficiency, increased emissions, and potential damage to other components of the emission control system over time. It is recommended to address the issue promptly.

7. How much does it typically cost to repair OBDII code P20BF in a 2014 GMC Sierra?

The cost of repairing OBDII code P20BF in a 2014 GMC Sierra can vary depending on the specific cause of the issue, the required parts, and labor costs. It is advisable to consult with a professional mechanic for an accurate estimate.

8. Is OBDII code P20BF a common issue in 2014 GMC Sierra vehicles?

While OBDII code P20BF "Reductant Heater 2 Control Circuit Low Voltage" is not as common as some other codes, it can still occur in 2014 GMC Sierra vehicles due to various factors such as component wear, electrical issues, or module failures.

9. Can I reset the OBDII code P20BF in my 2014 GMC Sierra using an OBDII scanner?

Resetting the OBDII code P20BF in a 2014 GMC Sierra using an OBDII scanner may clear the code temporarily, but if the underlying issue causing the low voltage condition is not addressed, the code is likely to return. It is recommended to diagnose and repair the root cause of the problem.

10. How long does it typically take to repair OBDII code P20BF in a 2014 GMC Sierra?

The time it takes to repair OBDII code P20BF in a 2014 GMC Sierra can vary depending on the complexity of the issue, availability of parts, and the mechanic's expertise. In general, the repair process may take a few hours to complete.

Discuss the causes and fixes for P20BF 2014 GMC Sierra OBDII Code

Submit a New Comment

Code P20BF 2014 GMC Sierra comments

No comments found for this page.