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P20BC 2014 Chevrolet Silverado Code - Reductant Heater 1 Control Circuit High Voltage

Quick Answer

The P20BC diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado refers to a problem with the Reductant Heater 1 Control Circuit, specifically indicating high voltage. Common causes include Faulty Reductant Heater 1, Damaged wiring or connectors in the control circuit, ECM malfunction. 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 2014 Chevrolet Silverado indicates Reductant Heater 1 Control Circuit High Voltage.
Common causes
Common causes include Faulty Reductant Heater 1, Damaged wiring or connectors in the control circuit, ECM malfunction.
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
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Code P20BC 2014 Chevrolet Silverado Description

The P20BC diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado refers to a problem with the Reductant Heater 1 Control Circuit, specifically indicating high voltage. In modern diesel vehicles, Selective Catalytic Reduction (SCR) systems are used to reduce harmful emissions. The Reductant Heater is a crucial component of the SCR system, responsible for heating the Diesel Exhaust Fluid (DEF) to optimize its performance in reducing nitrogen oxide emissions.

OBDII Code P20BC 2014 Chevrolet Silverado - Reductant Heater 1 Control Circuit High Voltage
P20BC 2014 Chevrolet Silverado Code - Reductant Heater 1 Control Circuit High Voltage

Common Causes of P20BC 2014 Chevrolet Silverado

  1. Faulty Reductant Heater 1
  2. Damaged wiring or connectors in the control circuit
  3. ECM malfunction
  4. Corrosion in the electrical connections
  5. Extreme temperatures affecting the heater's performance

Symptoms of P20BC 2014 Chevrolet Silverado

  1. Check Engine Light illuminated
  2. Reduced engine performance or power
  3. Increased fuel consumption
  4. Failed emissions test
  5. DEF system warning message on the dashboard

How to Fix P20BC 2014 Chevrolet Silverado

  1. Begin by conducting a thorough inspection of the Reductant Heater 1 and its associated wiring for any visible damage or corrosion.
  2. Test the electrical connections and harness using a multimeter to check for continuity and proper voltage levels.
  3. If the heater itself is faulty, it may need to be replaced with a new unit.
  4. Clear the DTC using a diagnostic scan tool and monitor the system for any recurring issues.
  5. Reset the ECM and perform a test drive to ensure the problem has been resolved.

Cost to Fix P20BC 2014 Chevrolet Silverado

The cost of repairing a P20BC code on a 2014 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, replacing a faulty Reductant Heater 1 can range from $200 to $500, including parts and labor. Additional costs may be incurred if wiring repairs or ECM reprogramming are necessary. It's recommended to consult with a qualified mechanic or dealership for an accurate estimate based on the specific diagnosis and repair requirements. Labor rates at auto repair shops typically range from $80 to $150 per hour, but can vary based on location and other factors.

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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 P20BC 2014 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P20BC on a 2014 Chevrolet Silverado related to the Reductant Heater 1 Control Circuit High Voltage?

- Common symptoms include the check engine light illuminating, reduced engine performance, and potential issues with the vehicle's emissions system.

2. What are the possible causes of OBDII code P20BC on a 2014 Chevrolet Silverado?

- The code P20BC can be triggered by issues such as a faulty reductant heater, damaged wiring or connectors, a malfunctioning powertrain control module (PCM), or a blown fuse.

3. How can I diagnose the cause of OBDII code P20BC on my 2014 Chevrolet Silverado?

- Diagnosing the issue may involve inspecting the reductant heater system, checking the wiring and connectors for damage, testing the heater's resistance, and verifying proper voltage supply to the heater.

4. Are there any DIY repair tips for addressing OBDII code P20BC on a 2014 Chevrolet Silverado?

- DIY repair tips may include checking and replacing blown fuses, repairing damaged wiring or connectors, and replacing the reductant heater if it is found to be faulty.

5. Can driving with OBDII code P20BC on a 2014 Chevrolet Silverado cause further damage to the vehicle?

- While driving with the code may not immediately harm the vehicle, prolonged driving with emission-related issues can potentially lead to increased emissions, reduced fuel efficiency, and ultimately, harm the environment.

6. Is it safe to continue driving my 2014 Chevrolet Silverado with the check engine light on due to code P20BC?

- It is generally recommended to address the underlying issue causing the check engine light to ensure optimal vehicle performance and emissions compliance.

7. How much does it typically cost to repair OBDII code P20BC on a 2014 Chevrolet Silverado at a dealership or repair shop?

- The cost of repairing code P20BC can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Will resetting the check engine light resolve OBDII code P20BC on a 2014 Chevrolet Silverado?

- Resetting the check engine light may temporarily turn off the light, but it will not fix the underlying issue causing the code. It is important to diagnose and repair the problem to prevent it from reoccurring.

9. Can a faulty reductant heater impact the overall performance of a 2014 Chevrolet Silverado?

- Yes, a faulty reductant heater can impact the vehicle's emissions system, potentially leading to reduced engine performance and fuel efficiency.

10. How frequently does OBDII code P20BC related to the Reductant Heater 1 Control Circuit High Voltage occur in 2014 Chevrolet Silverado vehicles?

- The occurrence of code P20BC can vary among vehicles, but it is not an uncommon issue in 2014 Chevrolet Silverado models, especially as the vehicle ages.

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