AutoCodes – Chevrolet – B048E 2018 Chevrolet Silverado

B048E 2018 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 2018 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 302

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 2018 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 2018 Chevrolet Silverado - Auxiliary Heater System Malfunction - AutoCodes.com — B048E 2018 Chevrolet Silverado Code - Auxiliary Heater System Malfunction

What does this mean?

What are the Possible Causes of the DTC B048E 2018 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 2018 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 2018 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 2018 Chevrolet Silverado code?

Need more information on how to fix the B048E 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B048E 2018 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 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code B048E in a 2018 Chevrolet Silverado?

The common symptoms of OBDII code B048E in a 2018 Chevrolet Silverado include a malfunctioning auxiliary heater system, reduced heating performance, and potential issues with the vehicle's climate control.

2. What are the possible causes of the Auxiliary Heater System Malfunction code B048E in a 2018 Chevrolet Silverado?

Possible causes of code B048E in a 2018 Chevrolet Silverado include a faulty auxiliary heater system control module, wiring issues, blown fuses, or a malfunctioning auxiliary heater itself.

3. How can I diagnose the OBDII code B048E in my 2018 Chevrolet Silverado?

To diagnose code B048E in a 2018 Chevrolet Silverado, you can use an OBDII scanner to read the code and investigate the auxiliary heater system components for any visible damage or issues. It's recommended to consult a professional mechanic for a thorough diagnosis.

4. Can I continue driving my 2018 Chevrolet Silverado with the B048E code present?

It is not recommended to continue driving your 2018 Chevrolet Silverado with the B048E code present, as it indicates a malfunction in the auxiliary heater system that may affect the vehicle's heating performance and climate control.

5. How can I repair the Auxiliary Heater System Malfunction code B048E in my 2018 Chevrolet Silverado?

Repairing the B048E code in a 2018 Chevrolet Silverado may involve replacing the faulty auxiliary heater system control module, repairing any damaged wiring, checking and replacing blown fuses, or fixing the malfunctioning auxiliary heater.

6. Is it possible to reset the OBDII code B048E in a 2018 Chevrolet Silverado without fixing the issue?

While it is possible to clear the B048E code using an OBDII scanner, it is not recommended to reset the code without addressing the underlying issue in the auxiliary heater system. Ignoring the problem may lead to further complications.

7. How much does it cost to repair the Auxiliary Heater System Malfunction code B048E in a 2018 Chevrolet Silverado?

The cost of repairing the B048E code in a 2018 Chevrolet Silverado can vary depending on the exact cause of the issue and the labor rates in your area. It's advisable to obtain quotes from reputable auto repair shops.

8. Can extreme weather conditions trigger the Auxiliary Heater System Malfunction code B048E in a 2018 Chevrolet Silverado?

Extreme cold weather conditions can potentially trigger the B048E code in a 2018 Chevrolet Silverado if the auxiliary heater system is under strain or if there are existing issues with the components. Regular maintenance can help prevent such occurrences.

9. Are there any preventive measures to avoid the recurrence of the OBDII code B048E in a 2018 Chevrolet Silverado?

Regularly inspecting and maintaining the auxiliary heater system components, following the manufacturer's recommended maintenance schedule, and addressing any heating system issues promptly can help prevent the recurrence of the B048E code in a 2018 Chevrolet Silverado.

10. How long does it typically take to repair the Auxiliary Heater System Malfunction code B048E in a 2018 Chevrolet Silverado?

The repair time for the B048E code in a 2018 Chevrolet Silverado can vary depending on the specific issue causing the malfunction. Simple fixes like replacing a blown fuse may take a short time, while more complex repairs could require several hours or more.