Engine-Codes - Gmc - B048E GMC

B048E GMC Code - Auxiliary Heater System Malfunction

- Code Popularity: 569 Views
- Repair Importance Level: 1/3
- Repair Difficulty Level: 2/3
Table of contents

|What are the Possible Causes of the Code B048E GMC?

  • 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 B048E GMC Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|Code B048E GMC 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 B048E GMC?

Labor: 1.0

The cost to diagnose the B048E GMC code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

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|What are Code B048E GMC Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|What Does the B048E GMC Code Mean?

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.

Auxiliary Heater System Malfunction

|Need more Information on the B048E GMC Code?

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|Need Help with the B048E GMC Code?

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