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Engine-Codes – Generic – B14B3

B14B3 Code - Passenger Seat Heater Thermistor Circuit Open

Quick Answer

The B14B3 diagnostic trouble code (DTC) indicates that there is an open circuit in the thermistor of the passenger seat heater. Common causes include Damaged or frayed wiring in the seat heater circuit, Faulty thermistor in the passenger seat, Loose or corroded electrical connections in the seat heater system. 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
B14B3 indicates Passenger Seat Heater Thermistor Circuit Open.
Common causes
Common causes include Damaged or frayed wiring in the seat heater circuit, Faulty thermistor in the passenger seat, Loose or corroded electrical connections in the seat heater system.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code B14B3 Description

The B14B3 diagnostic trouble code (DTC) indicates that there is an open circuit in the thermistor of the passenger seat heater. The thermistor is a temperature sensor that helps regulate the heat output of the seat heater. An open circuit means that there is a break in the electrical connection, causing the passenger seat heater to not function properly. This can lead to discomfort for passengers, especially in colder weather, and can also indicate an underlying electrical issue within the vehicle.

OBDII Code B14B3 - Passenger Seat Heater Thermistor Circuit Open
B14B3 Code - Passenger Seat Heater Thermistor Circuit Open

Common Causes of B14B3

  1. Damaged or frayed wiring in the seat heater circuit
  2. Faulty thermistor in the passenger seat
  3. Loose or corroded electrical connections in the seat heater system
  4. Issues with the seat heater control module or sensor

Symptoms of B14B3

  1. Passenger seat heater not working or only working intermittently
  2. Inability to adjust the temperature of the passenger seat heater
  3. Dashboard warning light indicating an issue with the seat heater system
  4. Uneven heating or lack of heat distribution in the passenger seat

How to Fix B14B3

  1. Begin by locating and inspecting the wiring and connections in the passenger seat heater circuit for any damage or corrosion.
  2. Test the thermistor in the passenger seat to determine if it is faulty and needs replacement.
  3. Check and tighten any loose electrical connections in the seat heater system.
  4. If the issue persists, replace the seat heater control module or sensor as needed.
  5. Clear the DTC from the vehicle's computer system and test the passenger seat heater to ensure it is functioning properly.

Cost to Fix B14B3

The cost of repairing a passenger seat heater thermistor circuit open issue can vary depending on the extent of the problem and the specific components that need to be replaced. On average, the parts for this repair can range from $50 to $200, while the labor costs can be anywhere from $100 to $300. Keep in mind that these are rough estimates and actual costs may differ based on the factors mentioned earlier. It is recommended to consult with a professional mechanic or dealership for a more accurate cost estimate.

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Code B14B3 Information for Specific Makes

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 B14B3 Code

1. What are common symptoms of OBDII code B14B3 (Passenger Seat Heater Thermistor Circuit Open)?

- Common symptoms include the passenger seat heater not functioning properly or not heating up at all.

2. What causes the OBDII code B14B3 to be triggered?

- The code is typically triggered when there is an open circuit in the thermistor circuit of the passenger seat heater.

3. How can I diagnose the issue related to OBDII code B14B3?

- You can diagnose the issue by checking the wiring and connections related to the passenger seat heater thermistor, and using a multimeter to test for continuity.

4. Is it safe to drive with the OBDII code B14B3 present?

- It is generally safe to drive with this code present, but the passenger seat heater will not function until the issue is resolved.

5. Can I fix the OBDII code B14B3 issue on my own?

- If you have experience with automotive electrical systems, you may be able to fix the issue on your own by checking and repairing any damaged wiring or connections.

6. Are there any temporary fixes for the OBDII code B14B3 until I can get it repaired?

- One temporary fix is to disconnect the passenger seat heater to prevent any further issues until the problem can be properly diagnosed and repaired.

7. How much does it typically cost to repair the OBDII code B14B3 issue?

- The cost of repair can vary depending on the extent of the damage and whether you do the repair yourself or take it to a professional. It may involve replacing wiring, connectors, or the thermistor itself.

8. Will resetting the OBDII code B14B3 make it go away permanently?

- Resetting the code may temporarily clear the error code, but it will likely return if the underlying issue causing the open circuit in the thermistor circuit is not addressed.

9. Can the OBDII code B14B3 be caused by a faulty passenger seat heater switch?

- While it is possible for a faulty switch to cause issues with the passenger seat heater, the B14B3 code specifically indicates an open circuit in the thermistor circuit.

10. Is the OBDII code B14B3 specific to certain vehicle makes and models?

- The B14B3 code may be specific to certain makes and models that use a similar passenger seat heater system with a thermistor circuit. It is important to consult your vehicle's specific diagnostic information for accurate details.

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