AutoCodes – Chevrolet – B048D 2014 Chevrolet Silverado

B048D 2014 Chevrolet Silverado Code - Auxiliary Heater Temperature Command Circuit

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: B048D 2014 Chevrolet Silverado indicates Auxiliary Heater Temperature Command Circuit.
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 400

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 B048D 2014 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 B048D 2014 Chevrolet Silverado - Auxiliary Heater Temperature Command Circuit - AutoCodes.com — B048D 2014 Chevrolet Silverado Code - Auxiliary Heater Temperature Command Circuit

What does this mean?

What are the Possible Causes of the DTC B048D 2014 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 B048D 2014 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

B048D:01 Auxiliary Heater Temperature Command Circuit Short to Battery
B048D:06 Auxiliary Heater Temperature Command Circuit Low Voltage/Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B048D 2014 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 B048D 2014 Chevrolet Silverado code?

Need more information on how to fix the B048D 2014 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 B048D 2014 Chevrolet Silverado Code

1. What does the OBDII code B048D for a 2014 Chevrolet Silverado mean?

The code B048D relates to the Auxiliary Heater Temperature Command Circuit in a 2014 Chevrolet Silverado.

2. What are the common symptoms of OBDII code B048D in a 2014 Chevrolet Silverado?

Common symptoms of code B048D may include issues with the auxiliary heater not functioning properly, reduced heating performance, or a check engine light.

3. What are the possible causes of OBDII code B048D in a 2014 Chevrolet Silverado?

Potential causes of code B048D can include a faulty auxiliary heater temperature sensor, wiring issues, a malfunctioning control module, or a blown fuse related to the auxiliary heater system.

4. How can I diagnose the OBDII code B048D in my 2014 Chevrolet Silverado?

Diagnosing code B048D may involve using a OBDII scanner to retrieve the specific error code, inspecting the auxiliary heater system components for any visible damage, and testing the sensor and wiring for proper functionality.

5. How can I repair OBDII code B048D in my 2014 Chevrolet Silverado?

Repairing code B048D may require replacing a faulty auxiliary heater temperature sensor, repairing damaged wiring, resetting the control module, or replacing any blown fuses related to the auxiliary heater system.

6. Can I continue driving my 2014 Chevrolet Silverado with OBDII code B048D?

It is not recommended to continue driving with an unresolved OBDII code like B048D, as it can lead to further damage to the auxiliary heater system and potentially affect the vehicle's performance.

7. Is it possible to clear the OBDII code B048D in my 2014 Chevrolet Silverado without fixing the issue?

While clearing the code temporarily may turn off the check engine light, it is essential to address the underlying problem causing the code to prevent future issues with the auxiliary heater system.

8. How much does it typically cost to repair OBDII code B048D in a 2014 Chevrolet Silverado?

The cost of repairing code B048D can vary depending on the specific issue causing the code, the parts needed for repair, and labor costs. It is advisable to consult a mechanic for a more accurate estimate.

9. Can extreme weather conditions trigger OBDII code B048D in a 2014 Chevrolet Silverado?

Extreme cold or hot weather conditions can potentially impact the operation of the auxiliary heater system and contribute to triggering code B048D in a 2014 Chevrolet Silverado.

10. Are there any preventive maintenance tips to avoid OBDII code B048D in a 2014 Chevrolet Silverado?

Regularly inspecting the auxiliary heater system components, keeping the system clean and free of debris, and addressing any issues promptly can help prevent the occurrence of code B048D in a 2014 Chevrolet Silverado.