AutoCodes – Jeep – B104D Jeep

B104D Jeep Code - Blend Door Control Circuit Low

Quick Answer

The Powertrain Control Module (PCM) factors the Blend Door position and Blower Motor speed information into the coolant temperature modeling. Common causes include Faulty Blend Door Actuator, Blend Door Actuator harness is open or shorted, Blend Door Actuator 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: B104D Jeep indicates Blend Door Control Circuit Low.
Common causes: Common causes include Faulty Blend Door Actuator, Blend Door Actuator harness is open or shorted, Blend Door Actuator 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 9,758

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 11, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B104D Jeep Description

The Powertrain Control Module (PCM) factors the Blend Door position and Blower Motor speed information into the coolant temperature modeling. This information is received as a raw voltage signal from the Heating, Ventilation, & Air Conditioning (HVAC) Module over the Can Bus.

OBDII Code B104D Jeep - Blend Door Control Circuit Low - AutoCodes.com — B104D Jeep Code - Blend Door Control Circuit Low

What does this mean?

What are the Possible Causes of the DTC B104D Jeep?

Faulty Blend Door Actuator
Blend Door Actuator harness is open or shorted
Blend Door Actuator circuit poor electrical connection
Faulty Heating, Ventilation, & Air Conditioning (HVAC) Module

How to Fix the DTC B104D Jeep?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B104D Jeep 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 B104D Jeep Code

1. What are common symptoms of the OBDII code B104D in a Jeep related to the Blend Door Control Circuit Low?

- Common symptoms include inconsistent heating or cooling inside the vehicle, the inability to adjust the temperature settings, or the HVAC system blowing only hot or cold air.

2. What are the possible causes of the B104D code related to the Blend Door Control Circuit Low in a Jeep?

- Possible causes include a faulty blend door actuator, a damaged blend door, wiring issues, or a malfunctioning HVAC control module.

3. How can I diagnose the B104D code for the Blend Door Control Circuit Low in my Jeep?

- Diagnose the code by checking the blend door actuator for proper operation, inspecting the blend door for any obstructions or damage, and testing the wiring and connections for continuity and proper voltage.

4. Can I drive my Jeep with the B104D code related to the Blend Door Control Circuit Low?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to avoid discomfort and potential further damage to the HVAC system.

5. How can I repair the B104D code for the Blend Door Control Circuit Low in my Jeep?

- Repair options may include replacing the blend door actuator, repairing or replacing the blend door, fixing any wiring issues, or reprogramming the HVAC control module.

6. Is it possible to reset the B104D code related to the Blend Door Control Circuit Low in a Jeep without repairs?

- While clearing the trouble code may temporarily turn off the check engine light, it is crucial to address the underlying issue causing the code to prevent it from reoccurring.

7. Are there any DIY tips for fixing the B104D code for the Blend Door Control Circuit Low in a Jeep?

- DIY tips may include checking and securing any loose or damaged wiring, ensuring proper connection of the blend door actuator, and following a repair manual for guidance.

8. Can extreme weather conditions contribute to the occurrence of the B104D code in a Jeep?

- Yes, extreme temperatures can put additional strain on the HVAC system components, potentially leading to issues like the Blend Door Control Circuit Low code.

9. Will fixing the B104D code related to the Blend Door Control Circuit Low improve my Jeep's overall HVAC performance?

- Addressing the B104D code promptly can help restore proper functionality to the HVAC system, ensuring efficient heating and cooling as intended.

10. How long does it typically take to repair the B104D code in a Jeep associated with the Blend Door Control Circuit Low?

- The repair time can vary depending on the specific cause of the code, but it may range from a quick fix like reconnecting a loose wire to a more involved process like replacing the blend door actuator, which may take a few hours.