AutoCodes – Chevrolet – B048E 2016 Chevrolet Silverado

B048E 2016 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 2016 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 288

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 2016 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 2016 Chevrolet Silverado - Auxiliary Heater System Malfunction - AutoCodes.com — B048E 2016 Chevrolet Silverado Code - Auxiliary Heater System Malfunction

What does this mean?

What are the Possible Causes of the DTC B048E 2016 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 2016 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 2016 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 2016 Chevrolet Silverado code?

Need more information on how to fix the B048E 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 B048E 2016 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code B048E in a 2016 Chevrolet Silverado?

- Common symptoms include the auxiliary heater not working properly, reduced heating performance, and a possible check engine light.

2. What does the OBDII code B048E indicate in a 2016 Chevrolet Silverado?

- The code B048E signifies a malfunction in the auxiliary heater system of the vehicle.

3. What are some possible causes of the B048E code in a 2016 Chevrolet Silverado?

- Potential causes include a faulty auxiliary heater, issues with electrical connections, a malfunctioning control module, or sensor failures.

4. How can I diagnose the B048E code in my 2016 Chevrolet Silverado?

- Diagnosis typically involves checking the auxiliary heater system components, inspecting wiring and connections, and using a diagnostic scanner to retrieve trouble codes.

5. Can I continue driving my 2016 Chevrolet Silverado with the B048E code present?

- It is not recommended to drive with the B048E code active as it may lead to reduced heating performance and potential further damage to the auxiliary heater system.

6. How can I reset the B048E code in my 2016 Chevrolet Silverado?

- Resetting the code usually involves using a diagnostic scanner to clear the code after addressing the underlying issue causing the malfunction.

7. Are there any DIY repair tips for fixing the B048E code in a 2016 Chevrolet Silverado?

- DIY repairs may include checking and cleaning electrical connections, inspecting and replacing fuses, and ensuring proper functioning of the auxiliary heater components.

8. Is it recommended to seek professional help for repairing the B048E code in a 2016 Chevrolet Silverado?

- Due to the complexity of the auxiliary heater system, it is advisable to consult a qualified mechanic or dealership for accurate diagnosis and repair of the B048E code.

9. How much does it typically cost to repair the B048E code in a 2016 Chevrolet Silverado?

- Repair costs can vary depending on the exact cause of the issue, but expenses may include parts replacement, labor charges, and diagnostic fees.

10. Can weather conditions affect the occurrence of the B048E code in a 2016 Chevrolet Silverado?

- Extreme weather conditions or prolonged non-usage of the auxiliary heater system can sometimes contribute to the triggering of the B048E code. Regular system checks are advisable to prevent such issues.