AutoCodes - OBDII Code List - B048D CADILLAC

B048D CADILLAC - Auxiliary Heater Temperature Command Circuit

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

B048D CADILLAC 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 do I fix code B048D CADILLAC?

Check 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.

Tech Notes

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

Cost of diagnosing the B048D CADILLAC code

Labor: 1.0

The cost of diagnosing the B048D CADILLAC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

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

B048D CADILLAC Description

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.
OBDII Code B048d Cadillac - Auxiliary Heater Temperature Command Circuit - AutoCodes.com

More Information

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