AutoCodes – Chevrolet – B048E 2015 Chevrolet Silverado

B048E 2015 Chevrolet Silverado Code - Auxiliary Heater System Malfunction

Quick Answer

The Heating, Ventilation, and Air Conditioning (HVAC) Control Module sends a low side pulse width modulation (PWM) signal to request electrical auxiliary heater operation if the interior temperature is too low and additional heat is required. Common causes include Faulty Electrical Auxiliary Heater, Electrical Auxiliary Heater harness is open or shorted, Electrical Auxiliary Heater circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B048E 2015 Chevrolet Silverado indicates Auxiliary Heater System Malfunction.
Common causes: Common causes include Faulty Electrical Auxiliary Heater, Electrical Auxiliary Heater harness is open or shorted, Electrical Auxiliary Heater circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 266

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 12, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B048E 2015 Chevrolet Silverado Description

The Heating, Ventilation, and Air Conditioning (HVAC) Control Module sends a low side pulse width modulation (PWM) signal to request electrical auxiliary heater operation if the interior temperature is too low and additional heat is required. The requested signal from the HVAC control module, battery positive, ignition, and ground circuits enable the electrical auxiliary heater to operate. The electrical auxiliary heater sends a ground signal to report the status of the heater operation. The Diagnostic Trouble Code (DTC) will be set when the feedback signal of the electrical auxiliary heater does not correspond with the requested PWM signal.

OBDII Code B048E 2015 Chevrolet Silverado - Auxiliary Heater System Malfunction - AutoCodes.com — B048E 2015 Chevrolet Silverado Code - Auxiliary Heater System Malfunction

What does this mean?

What are the Possible Causes of the DTC B048E 2015 Chevrolet Silverado?

Faulty Electrical Auxiliary Heater
Electrical Auxiliary Heater harness is open or shorted
Electrical Auxiliary Heater circuit poor electrical connection
Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module

How to Fix the DTC B048E 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 does this mean?

Code Tech Notes

B048E:01 Auxiliary Heater System Malfunction Short to Battery
B048E:06 Auxiliary Heater System Malfunction Low Voltage/Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B048E 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 B048E 2015 Chevrolet Silverado code?

Need more information on how to fix the B048E 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B048E 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 B048E 2015 Chevrolet Silverado Code

1. What does OBDII code B048E on a 2015 Chevrolet Silverado indicate?

Code B048E points to an Auxiliary Heater System Malfunction in the vehicle.

2. What are the common symptoms of an Auxiliary Heater System Malfunction in a 2015 Chevrolet Silverado?

Common symptoms include the heater not working properly, insufficient heat output, or no heat at all from the auxiliary heating system.

3. What are the potential causes of OBDII code B048E in a 2015 Chevrolet Silverado?

Causes of the Auxiliary Heater System Malfunction may include a faulty heater control module, wiring issues, a malfunctioning heater element, or a problem with the auxiliary heater system components.

4. How can I diagnose the Auxiliary Heater System Malfunction in my 2015 Chevrolet Silverado?

Diagnosing the issue involves checking the heater control module, inspecting the wiring for damage, testing the heater element for continuity, and ensuring all components of the auxiliary heater system are functioning correctly.

5. Can I still drive my 2015 Chevrolet Silverado with OBDII code B048E present?

It is generally safe to drive the vehicle with this code, but it is advisable to address the issue promptly to avoid discomfort in cold weather and prevent further damage to the auxiliary heater system.

6. How can I repair OBDII code B048E on my 2015 Chevrolet Silverado?

Repairing the Auxiliary Heater System Malfunction may involve replacing the heater control module, repairing or replacing damaged wiring, fixing the heater element, or addressing any other component issues identified during diagnosis.

7. Is it possible to reset the OBDII code B048E in a 2015 Chevrolet Silverado without fixing the issue?

While you can clear the code using an OBDII scanner, it is recommended to address the underlying problem causing the Auxiliary Heater System Malfunction to prevent it from recurring.

8. Are there any preventive maintenance tips to avoid OBDII code B048E in a 2015 Chevrolet Silverado?

Regularly checking and maintaining the auxiliary heater system components, ensuring proper electrical connections, and addressing any issues promptly can help prevent the occurrence of code B048E.

9. Can extreme weather conditions impact the occurrence of OBDII code B048E in a 2015 Chevrolet Silverado?

Yes, extreme cold or hot weather conditions can potentially exacerbate issues with the auxiliary heater system, leading to the triggering of code B048E.

10. Should I seek professional help to address OBDII code B048E in my 2015 Chevrolet Silverado?

If you are unsure about diagnosing or repairing the Auxiliary Heater System Malfunction, it is recommended to seek assistance from a qualified mechanic or dealership to ensure the issue is resolved correctly.