AutoCodes – Generic – B11EB

B11EB Code - Rear HVAC Temperature Control Input Circuit Short

Quick Answer

Under normal operation, the rear auxiliary control is supplied a 5-volt reference and ground from the Heating, Ventilation, and Air-Conditioning (HVAC) Module. Common causes include Faulty Rear HVAC Temperature Control, Rear HVAC Temperature Control harness is open or shorted, Rear HVAC Temperature Control 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: B11EB indicates Rear HVAC Temperature Control Input Circuit Short.
Common causes: Common causes include Faulty Rear HVAC Temperature Control, Rear HVAC Temperature Control harness is open or shorted, Rear HVAC Temperature Control 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 2,175

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 19, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B11EB Description

Under normal operation, the rear auxiliary control is supplied a 5-volt reference and ground from the Heating, Ventilation, and Air-Conditioning (HVAC) Module. When the auxiliary blower motor speed, airflow mode or temperature control is adjusted, the HVAC module reads the voltage from the rear auxiliary climate controls on the auxiliary blower motor speed, airflow mode, and temperature control feedback circuits to determine the requested setting. The OBDII code sets when the HVAC module senses an open, or short to ground or voltage on the rear auxiliary climate controls blower speed input circuit.

OBDII Code B11EB - Rear HVAC Temperature Control Input Circuit Short - AutoCodes.com — B11EB Code - Rear HVAC Temperature Control Input Circuit Short

What does this mean?

What are the Possible Causes of the DTC B11EB?

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

How to Fix the DTC B11EB?

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

B11EB:11 Rear HVAC Temperature Control Input Circuit Short to Ground
B11EB:15 Rear HVAC Temperature Control Input Circuit Short to Battery or Open

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B11EB 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.

Need more information about the B11EB code?

Need more information on how to fix the B11EB code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B11EB code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B11EB Ford — Rear HVAC Temperature Control Input Circuit Short
B11EB Lincoln — Rear HVAC Temperature Control Input Circuit Short
B11EB Mercury — Rear HVAC Temperature Control Input Circuit Short

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 B11EB Code

1. What are the common symptoms of OBDII code B11EB (Rear HVAC Temperature Control Input Circuit Short)?

- Common symptoms include erratic temperature control in the rear HVAC system, incorrect temperature readings, and the rear HVAC system not responding to temperature adjustments.

2. What are the possible causes of OBDII code B11EB?

- The code B11EB is usually caused by a short circuit in the rear HVAC temperature control input circuit. This can be due to damaged wiring, a faulty temperature sensor, or a malfunctioning HVAC control module.

3. How can I diagnose OBDII code B11EB?

- Diagnosing OBDII code B11EB involves using a scan tool to retrieve the code, checking the rear HVAC system for any visible damage or loose connections, and testing the temperature sensor and control module for proper functionality.

4. Can I still drive my vehicle with OBDII code B11EB?

- It is generally safe to drive your vehicle with the B11EB code, but you may experience issues with the rear HVAC system's temperature control. It is recommended to address the issue promptly to avoid discomfort while driving.

5. How can I repair OBDII code B11EB?

- Repairing OBDII code B11EB involves identifying and fixing the source of the short circuit in the rear HVAC temperature control input circuit. This may require repairing or replacing damaged wiring, the temperature sensor, or the HVAC control module.

6. Are there any DIY tips for fixing OBDII code B11EB?

- DIY tips for fixing OBDII code B11EB include checking for visible damage in the rear HVAC system wiring, ensuring all connections are secure, and using a multimeter to test the continuity of the circuit components.

7. Is it necessary to reset the OBDII code B11EB after repairs?

- Yes, it is important to clear the B11EB code after making repairs to the rear HVAC system. This can be done using a scan tool to reset the code and ensure that the issue has been resolved.

8. What should I do if OBDII code B11EB keeps coming back after repairs?

- If the B11EB code keeps coming back after repairs, it may indicate that the underlying issue was not fully resolved. In this case, a more thorough diagnosis of the rear HVAC system may be necessary to identify and address the root cause.

9. Can extreme temperatures or weather conditions trigger OBDII code B11EB?

- Extreme temperatures or weather conditions are unlikely to directly trigger OBDII code B11EB. However, temperature fluctuations can sometimes exacerbate existing issues in the rear HVAC system, leading to the code being triggered.

10. How much does it typically cost to repair OBDII code B11EB at a professional auto repair shop?

- The cost of repairing OBDII code B11EB at a professional auto repair shop can vary depending on the exact cause of the issue, the extent of the repairs needed, and the shop's labor rates. It is recommended to obtain quotes from multiple shops for an accurate estimate.