AutoCodes – GMC – P20BA 2015 GMC Sierra

P20BA 2015 GMC Sierra Code - Reductant Heater 1 Performance

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: P20BA 2015 GMC Sierra indicates Reductant Heater 1 Performance.
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 165

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
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Code P20BA 2015 GMC Sierra 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 resistance is greater or less than a calibrated value for greater than 8 s.

OBDII Code P20BA 2015 GMC Sierra - Reductant Heater 1 Performance - AutoCodes.com — P20BA 2015 GMC Sierra Code - Reductant Heater 1 Performance

What does this mean?

What are the Possible Causes of the DTC P20BA 2015 GMC Sierra?

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 P20BA 2015 GMC Sierra?

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 P20BA 2015 GMC Sierra 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 P20BA 2015 GMC Sierra code?

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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 P20BA 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code P20BA in a 2015 GMC Sierra?

The common symptoms of OBDII code P20BA, also known as Reductant Heater 1 Performance, in a 2015 GMC Sierra may include the Check Engine Light coming on, reduced engine performance, and poor fuel efficiency.

2. What are the possible causes of OBDII code P20BA in a 2015 GMC Sierra?

Possible causes of OBDII code P20BA in a 2015 GMC Sierra include a faulty reductant heater 1, wiring issues, a defective reductant heater control module, or problems with the reductant heater circuit.

3. How can I diagnose OBDII code P20BA in my 2015 GMC Sierra?

Diagnosing OBDII code P20BA in a 2015 GMC Sierra typically involves using an OBDII scanner to retrieve the code, inspecting the reductant heater 1 and related components for any visible damage or corrosion, and testing the electrical connections for proper voltage and continuity.

4. Can I still drive my 2015 GMC Sierra with OBDII code P20BA?

It is not recommended to drive your 2015 GMC Sierra with OBDII code P20BA for an extended period as it can lead to reduced engine performance and potential damage to the emission control system. It is best to address the issue promptly.

5. How do I repair OBDII code P20BA in my 2015 GMC Sierra?

Repairing OBDII code P20BA in a 2015 GMC Sierra may involve replacing the faulty reductant heater 1, repairing any damaged wiring or connectors, resetting the fault codes, and conducting a thorough system check to ensure proper functionality.

6. Can a DIY enthusiast fix OBDII code P20BA in a 2015 GMC Sierra?

While some aspects of diagnosing and repairing OBDII code P20BA in a 2015 GMC Sierra may be possible for a DIY enthusiast with the necessary tools and knowledge, it is recommended to consult a professional mechanic for a thorough diagnosis and proper repair to ensure the issue is resolved correctly.

7. How much does it cost to fix OBDII code P20BA in a 2015 GMC Sierra?

The cost of fixing OBDII code P20BA in a 2015 GMC Sierra can vary depending on the root cause of the issue, the required parts, and labor costs. It is advisable to obtain quotes from reputable mechanics or dealerships for an accurate estimate.

8. Will resetting the Check Engine Light resolve OBDII code P20BA in my 2015 GMC Sierra?

Simply resetting the Check Engine Light without addressing the underlying issue causing OBDII code P20BA in a 2015 GMC Sierra is not a recommended long-term solution. It is crucial to diagnose and repair the root cause of the problem to prevent further issues.