Engine-Codes - Cadillac - B048D CADILLAC

B048D CADILLAC Code - Auxiliary Heater Temperature Command Circuit

Repair Importance Level: 1/3
Repair Difficulty Level: 2/3  What is this?
Table of contents

|B048D CADILLAC code possible causes

  • 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 is the B048D CADILLAC code repair?

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.

|B048D CADILLAC code tech notes

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

|What is the cost to diagnose the B048D CADILLAC code

Labor: 1.0

The cost to diagnose the B048D CADILLAC 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.

|What are B048D CADILLAC code possible symptoms?

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

|What is B048D CADILLAC code meaning?

The Heating, Ventilation, and Air Conditioning (HVAC) Control Module sends a Pulse Width Modulation (PWM) signal to the electrical auxiliary heater, if the interior temperature is too low and additional heat is requested. The request signal from the HVAC control module, battery positive, ignition and ground circuits enable the electrical auxiliary heater to operate. Through the signal circuit the electrical auxiliary heater sends via a PWM signal the current status to the HVAC control module.

|Need more information with the B048D CADILLAC code?

Need more information on how to fix the B048D CADILLAC code?
Get Access to Factory Service Manuals

|Need help with a B048D CADILLAC code?

Get the B048d Cadillac code diagnosed by a professional: Find a repair shop in your area