AutoCodes – Generic – B1E99

B1E99 Code - Front Left Heater Control Circuit

Quick Answer

The Comfort Seat Wheel Module (CSWM) monitors the Front Left Heater Control Circuit. Common causes include Faulty Front Left Seat Back Heater Element, Front Left Seat Back Heater Element harness is open or shorted, Front Left Seat Back Heater Element circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B1E99 indicates Front Left Heater Control Circuit.
Common causes: Common causes include Faulty Front Left Seat Back Heater Element, Front Left Seat Back Heater Element harness is open or shorted, Front Left Seat Back Heater Element circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 4,616

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 04, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B1E99 Description

The Comfort Seat Wheel Module (CSWM) monitors the Front Left Heater Control Circuit. The CSWM sets the OBDII code when the CSWM detects on the Left Front Seat Heater Control circuit an impedance equal to or above 7.0 Ohms for more than two seconds, a voltage below 1.0 volt or a current above 10.0 amps for more than two seconds with the output turned on, a voltage above 5.0 volts for more than two seconds with the output turned off or a current below 0.5 of an amp for more than two seconds with the output turned on.

OBDII Code B1E99 - Front Left Heater Control Circuit - AutoCodes.com — B1E99 Code - Front Left Heater Control Circuit

What does this mean?

What are the Possible Causes of the DTC B1E99?

Faulty Front Left Seat Back Heater Element
Front Left Seat Back Heater Element harness is open or shorted
Front Left Seat Back Heater Element circuit poor electrical connection
Faulty Comfort Seat Wheel Module (CSWM)

How to Fix the DTC B1E99?

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

B1E99-1E FRONT LEFT HEATER CONTROL CIRCUIT RESISTANCE OUT OF RANGE
B1E99-11 FRONT LEFT HEATER CONTROL CIRCUIT SHORT TO GROUND
B1E99-12 FRONT LEFT HEATER CONTROL CIRCUIT SHORT TO BATTERY
B1E99-13 FRONT LEFT HEATER CONTROL CIRCUIT OPEN

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1E99 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 B1E99 code?

Need more information on how to fix the B1E99 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1E99 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1E99 Chrysler — Front Left Heater Control Circuit
B1E99 Dodge — Front Left Heater Control Circuit
B1E99 Jeep — Front Left Heater Control Circuit
B1E99 RAM — Front Left Heater Control 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.

Frequently Asked Questions about B1E99 Code

1. What are the common symptoms of OBDII code B1E99 (Front Left Heater Control Circuit)?

- Common symptoms include a lack of heat coming from the front left side of the vehicle, inconsistent temperature control, or the heater not functioning at all.

2. What are the possible causes of OBDII code B1E99?

- The code B1E99 can be triggered by a faulty front left heater control module, a wiring issue, a blown fuse, or a malfunctioning temperature sensor.

3. How can I diagnose the Front Left Heater Control Circuit issue?

- Diagnosing the B1E99 code typically involves using an OBDII scanner to retrieve the specific fault codes, checking the wiring and connections related to the front left heater, and testing the various components for proper functionality.

4. Can I still drive my vehicle with OBDII code B1E99?

- It is generally safe to drive the vehicle with the B1E99 code, but it is recommended to address the issue promptly to ensure proper heating functionality during colder weather.

5. How can I repair OBDII code B1E99 on my own?

- DIY repair options may include checking and replacing any blown fuses related to the front left heater, inspecting and repairing any damaged wiring, or replacing the front left heater control module if necessary.

6. Is it necessary to visit a mechanic for OBDII code B1E99?

- While it is possible to address the B1E99 code on your own, consulting a mechanic or automotive professional is recommended for a thorough diagnosis and proper repair to ensure the issue is resolved correctly.

7. Can weather conditions affect the Front Left Heater Control Circuit?

- Extreme weather conditions like cold temperatures or excessive moisture can potentially exacerbate issues related to the front left heater control circuit, leading to malfunctions or failures.

8. Will resetting the OBDII code B1E99 make the issue go away?

- Simply resetting the B1E99 code may temporarily clear the fault, but if the underlying issue causing the code is not addressed, it is likely to reappear. It is best to diagnose and repair the root cause of the problem.

9. Are there any maintenance tips to prevent OBDII code B1E99 from occurring?

- Regularly inspecting the heating system components, ensuring proper wiring connections, and addressing any issues promptly can help prevent the occurrence of the B1E99 code.

10. How much does it typically cost to repair OBDII code B1E99 at a repair shop?

- The cost of repairing OBDII code B1E99 can vary depending on the specific cause of the issue, but it may range from a few hundred to a few thousand dollars, including parts and labor.