AutoCodes – GMC – P20BA 2014 GMC Sierra

P20BA 2014 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 2014 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 149

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 2014 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 2014 GMC Sierra - Reductant Heater 1 Performance - AutoCodes.com — P20BA 2014 GMC Sierra Code - Reductant Heater 1 Performance

What does this mean?

What are the Possible Causes of the DTC P20BA 2014 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 2014 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 2014 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 2014 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 2014 GMC Sierra Code

1. What are common symptoms of OBDII code P20BA in a 2014 GMC Sierra?

- Common symptoms include the check engine light turning on, reduced engine performance, and potential issues with emissions control systems.

2. What does the OBDII code P20BA mean for a 2014 GMC Sierra?

- The code P20BA indicates a performance issue with Reductant Heater 1 in the vehicle's emissions control system.

3. What are possible causes of OBDII code P20BA in a 2014 GMC Sierra?

- Possible causes include a faulty Reductant Heater 1, wiring issues, a malfunctioning temperature sensor, or a problem with the vehicle's powertrain control module.

4. How can I diagnose OBDII code P20BA in my 2014 GMC Sierra?

- Diagnosing this code typically involves using a diagnostic scanner to retrieve the specific error code, checking the Reductant Heater 1 component, inspecting related wiring, and testing the temperature sensor.

5. Can I continue driving my 2014 GMC Sierra with OBDII code P20BA?

- It is not recommended to continue driving the vehicle with this code present, as it may lead to reduced engine performance and potentially affect emissions compliance.

6. How can I repair OBDII code P20BA in my 2014 GMC Sierra?

- Repair options may include replacing the Reductant Heater 1 component, repairing any damaged wiring, replacing the temperature sensor, or resetting the powertrain control module.

7. Will OBDII code P20BA in a 2014 GMC Sierra cause a vehicle to fail emissions testing?

- Yes, a vehicle with this code may fail emissions testing due to the impact on emissions control system performance.

8. Are there any DIY repair tips for addressing OBDII code P20BA in a 2014 GMC Sierra?

- DIY repair tips may include checking for loose or damaged wiring, ensuring proper connection of the Reductant Heater 1 component, and clearing the code with a diagnostic scanner after repairs are made.

9. How do I reset the check engine light after fixing OBDII code P20BA in my 2014 GMC Sierra?

- You can typically reset the check engine light using a diagnostic scanner or by disconnecting the vehicle's battery for a few minutes to clear the error code.

10. Is it recommended to seek professional help for repairing OBDII code P20BA in a 2014 GMC Sierra?

- Due to the complexity of the emissions control system and potential issues involved, it is often recommended to seek professional help from a certified mechanic for diagnosing and repairing this code.