AutoCodes – Generic – B0193

B0193 Code - Front Blower Motor Speed Circuit

Quick Answer

The blower motor speed control signal from the Heating, Ventilation and Air Conditioning (HVAC) Control Module, battery positive, and ground circuits enable the blower motor to operate. Common causes include Faulty Front Blower Motor, Front Blower Motor harness is open or shorted, Front Blower Motor 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: B0193 indicates Front Blower Motor Speed Circuit.
Common causes: Common causes include Faulty Front Blower Motor, Front Blower Motor harness is open or shorted, Front Blower Motor 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 9,487

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 11, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
Comments
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Code B0193 Description

The blower motor speed control signal from the Heating, Ventilation and Air Conditioning (HVAC) Control Module, battery positive, and ground circuits enable the blower motor to operate. The blower motor control circuitry is integrated into the blower motor assembly. The HVAC control module provides a ground Pulse Width Modulation (PWM) signal to the blower motor to request a specific motor speed. The blower motor translates the PWM signal and drives the motor accordingly.

OBDII Code B0193 - Front Blower Motor Speed Circuit - AutoCodes.com — B0193 Code - Front Blower Motor Speed Circuit

What does this mean?

What are the Possible Causes of the DTC B0193?

Faulty Front Blower Motor
Front Blower Motor harness is open or shorted
Front Blower Motor circuit poor electrical connection
Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module

How to Fix the DTC B0193?

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

B0193:01 Front Blower Motor Speed Circuit Short to Battery
B0193:06 Front Blower Motor Speed Circuit Low Voltage/Open

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0193 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.

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Information for Specific Makes

B0193 Buick — Front Blower Motor Speed Circuit
B0193 Cadillac — Front Blower Motor Speed Circuit
B0193 Chevrolet — Front Blower Motor Speed Circuit
B0193 GMC — Front Blower Motor Speed Circuit

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.