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Engine-Codes – Generic – B120A

B120A Code - Passenger Seat Cushion Temperature Sensor

Quick Answer

The B120A diagnostic trouble code refers to an issue with the passenger seat cushion temperature sensor in a vehicle. Common causes include Sensor malfunction due to wear and tear, Electrical issues in the sensor circuit, Damage to the sensor from spills or debris. 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
B120A indicates Passenger Seat Cushion Temperature Sensor.
Common causes
Common causes include Sensor malfunction due to wear and tear, Electrical issues in the sensor circuit, Damage to the sensor from spills or debris.
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 08, 2024
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Code B120A Description

The B120A diagnostic trouble code refers to an issue with the passenger seat cushion temperature sensor in a vehicle. This sensor is responsible for monitoring and regulating the temperature of the passenger seat cushion, ensuring the comfort of the occupant. When this sensor malfunctions or fails, it can lead to discomfort for the passenger and potentially affect the overall functionality of the vehicle's heating and cooling systems.

OBDII Code B120A - Passenger Seat Cushion Temperature Sensor
B120A Code - Passenger Seat Cushion Temperature Sensor

Common Causes of B120A

  1. Sensor malfunction due to wear and tear
  2. Electrical issues in the sensor circuit
  3. Damage to the sensor from spills or debris
  4. Faulty wiring connections to the sensor

Symptoms of B120A

  1. Inaccurate temperature readings on the passenger seat
  2. Dashboard warning lights related to the HVAC system
  3. Uncomfortable temperature fluctuations in the passenger seat
  4. HVAC system not responding to temperature adjustments

How to Fix B120A

  1. Begin by diagnosing the specific issue with a diagnostic scan tool to confirm the B120A trouble code.
  2. Locate and access the passenger seat cushion temperature sensor, which is typically located underneath the seat cover.
  3. Inspect the sensor for any visible damage, wear, or loose connections.
  4. Replace the sensor if it is found to be faulty, ensuring the new sensor is properly installed and calibrated.
  5. Clear the trouble code from the vehicle's system using the diagnostic scan tool to reset the HVAC system.

Cost to Fix B120A

The typical repair costs for addressing the B120A trouble code related to the passenger seat cushion temperature sensor can range from $150 to $300, including parts and labor. However, it is important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It is recommended to inquire about local rates for a more accurate estimate.

What does this mean?

Tech Notes for B120A

B120A:01 Passenger Seat Cushion Temperature Sensor General Electrical Failure
B120A:98 Passenger Seat Cushion Temperature Sensor Component or System Over Temperature

Need more information about the B120A code?

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Code B120A 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 B120A Code

1. What are common symptoms of OBDII code B120A related to the Passenger Seat Cushion Temperature Sensor?

The common symptoms include malfunctioning heated seats, inaccurate temperature readings, or a warning light on the dashboard.

2. What are the possible causes of OBDII code B120A for the Passenger Seat Cushion Temperature Sensor?

Possible causes include a faulty temperature sensor, damaged wiring, a blown fuse, or issues with the seat control module.

3. How can I diagnose the issue causing OBDII code B120A for the Passenger Seat Cushion Temperature Sensor?

You can diagnose the problem by using an OBDII scanner to read the code, checking the wiring for any visible damage, testing the sensor's resistance, and inspecting the seat control module.

4. Can I repair OBDII code B120A related to the Passenger Seat Cushion Temperature Sensor myself?

Depending on the exact cause, you may be able to repair it yourself by replacing the temperature sensor, fixing any damaged wiring, or replacing a blown fuse. However, more complex issues may require professional assistance.

5. Are there any temporary solutions for OBDII code B120A until I can get it repaired?

You may be able to temporarily resolve the issue by disconnecting the seat cushion temperature sensor to prevent further damage or malfunction until you can have it properly repaired.

6. How critical is it to address OBDII code B120A for the Passenger Seat Cushion Temperature Sensor?

While the issue may not directly impact the vehicle's performance, it is essential to address it promptly to ensure the proper functioning of the passenger seat's temperature control system.

7. Will OBDII code B120A for the Passenger Seat Cushion Temperature Sensor cause any safety concerns?

While the code itself may not pose immediate safety risks, a malfunctioning temperature sensor could lead to discomfort for passengers and potentially distract the driver if the issue is not addressed.

8. Is it possible for OBDII code B120A to trigger other related codes or issues in the vehicle?

Yes, a fault in the Passenger Seat Cushion Temperature Sensor system can sometimes trigger related codes or issues, such as problems with the heated seat function or other seat control systems.

9. How much does it typically cost to repair OBDII code B120A for the Passenger Seat Cushion Temperature Sensor?

The cost of repair can vary depending on the exact cause of the issue, but it may involve expenses for parts, labor, and diagnostic services. It is advisable to get estimates from automotive professionals.

10. Can I prevent OBDII code B120A related to the Passenger Seat Cushion Temperature Sensor from occurring in the future?

Regularly inspecting and maintaining the seat temperature control system, avoiding spills or damage to the seat, and addressing any issues promptly can help prevent the occurrence of this OBDII code.

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