AutoCodes – GMC – B0208 GMC

B0208 GMC Code - Rear Blower Motor Speed Malfunction

Quick Answer

The Auxiliary Blower Motor Control Module is an interface between the Heating, Ventilation, and Air Conditioning (HVAC) Control Module and the Auxiliary (Rear) Blower Motor. Common causes include Faulty Auxiliary (Rear) Blower Motor, Auxiliary (Rear) Blower Motor harness is open or shorted, Auxiliary (Rear) 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: B0208 GMC indicates Rear Blower Motor Speed Malfunction .
Common causes: Common causes include Faulty Auxiliary (Rear) Blower Motor, Auxiliary (Rear) Blower Motor harness is open or shorted, Auxiliary (Rear) 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 1,495

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 Mar 10, 2021

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B0208 GMC Description

The Auxiliary Blower Motor Control Module is an interface between the Heating, Ventilation, and Air Conditioning (HVAC) Control Module and the Auxiliary (Rear) Blower Motor. The auxiliary blower motor control module has 5 circuits: a B+ input, ground, a control signal from the HVAC module, a B+ output and a low side Pulse Width Modulation (PWM) control to the Auxiliary (Rear) Blower Motor. The HVAC control module provides a low side (PWM) signal to the auxiliary blower motor control module in order to request the auxiliary blower motor speed. The auxiliary blower motor control module grounds the blower motor using a low side PWM signal in order to vary the auxiliary blower motor speed.

OBDII Code B0208 GMC - Rear Blower Motor Speed Malfunction - AutoCodes.com — B0208 GMC Code - Rear Blower Motor Speed Malfunction

What does this mean?

What are the Possible Causes of the DTC B0208 GMC?

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

How to Fix the DTC B0208 GMC?

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

B0208 01 Rear Blower Motor Speed Circuit Short to Battery
B0208 06 Rear Blower Motor Speed Circuit Low Voltage/Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0208 GMC 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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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 B0208 GMC Code

1. What are the common symptoms of OBDII code B0208 GMC (Rear Blower Motor Speed Malfunction)?

- Common symptoms include the rear blower motor not working at all or not operating at the correct speed.

2. What are the possible causes of OBDII code B0208 GMC?

- The code B0208 GMC can be caused by a faulty rear blower motor, a defective blower motor resistor, wiring issues, or a problem with the HVAC control module.

3. How can I diagnose the issue related to OBDII code B0208 GMC?

- Diagnosing the issue involves checking the rear blower motor for proper operation, inspecting the blower motor resistor, and testing the wiring and connections for any faults.

4. Can I still drive my vehicle with OBDII code B0208 GMC?

- It is generally safe to drive the vehicle with this code, but you may experience discomfort due to the lack of rear HVAC functionality.

5. How can I repair OBDII code B0208 GMC?

- Repairing the code may involve replacing the rear blower motor, the blower motor resistor, or repairing any damaged wiring or connections. It is recommended to follow the manufacturer's repair procedures.

6. Is it possible to reset OBDII code B0208 GMC without fixing the issue?

- While you can clear the code with an OBDII scanner, it is not recommended to do so without addressing the underlying problem, as the issue may persist and affect the vehicle's performance.

7. How do I prevent OBDII code B0208 GMC from occurring again?

- To prevent the code from reoccurring, perform regular maintenance on the HVAC system, check for any signs of wear or damage, and address any issues promptly.

8. Can extreme weather conditions affect OBDII code B0208 GMC?

- Yes, extreme temperatures or humidity levels can sometimes exacerbate issues with the rear blower motor or related components, leading to the code B0208 GMC.

9. Will OBDII code B0208 GMC cause my check engine light to illuminate?

- The code B0208 GMC is related to the HVAC system and may not trigger the check engine light. However, it can still be retrieved using an OBDII scanner for diagnosis.

10. How long does it typically take to repair OBDII code B0208 GMC?

- The repair time for the code B0208 GMC can vary depending on the exact cause of the issue and the extent of the repair needed. It is advisable to consult a professional technician for an accurate estimate.