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Engine-Codes – Generic – B0955:3B

B0955:3B Code - Parking Assist Front Sensor Left Middle Circuit Self-Test Malfunction

Quick Answer

The B0955:3B diagnostic trouble code (DTC) specifically relates to a Parking Assist Front Sensor Left Middle Circuit Self-Test Malfunction. Common causes include Wiring harness damage or corrosion affecting the sensor circuit, Faulty front left middle parking sensor, Issues with the control module responsible for the parking assist system. 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
B0955:3B indicates Parking Assist Front Sensor Left Middle Circuit Self-Test Malfunction.
Common causes
Common causes include Wiring harness damage or corrosion affecting the sensor circuit, Faulty front left middle parking sensor, Issues with the control module responsible for the parking assist system.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code B0955:3B Description

The B0955:3B diagnostic trouble code (DTC) specifically relates to a Parking Assist Front Sensor Left Middle Circuit Self-Test Malfunction. This code indicates that there is an issue with the self-test function of the front left middle parking sensor in the vehicle's parking assist system. The parking assist system uses sensors located around the vehicle to detect obstacles and provide the driver with alerts to aid in parking and maneuvering in tight spaces.

OBDII Code B0955:3B - Parking Assist Front Sensor Left Middle Circuit Self-Test Malfunction
B0955:3B Code - Parking Assist Front Sensor Left Middle Circuit Self-Test Malfunction

Common Causes of B0955:3B

  1. Wiring harness damage or corrosion affecting the sensor circuit.
  2. Faulty front left middle parking sensor.
  3. Issues with the control module responsible for the parking assist system.
  4. Water or debris intrusion affecting sensor functionality.
  5. Electrical issues such as a blown fuse or relay related to the parking assist system.

Symptoms of B0955:3B

  1. Parking assist system not providing accurate distance warnings.
  2. Inability to detect obstacles while parking.
  3. Parking assist system alerts not functioning.
  4. Parking assist system disabled or not operational.

How to Fix B0955:3B

  1. Begin by conducting a thorough visual inspection of the wiring harness and sensor connections for any damage or corrosion.
  2. Test the front left middle parking sensor using a multimeter to check for proper functionality.
  3. Check the control module for any fault codes and ensure it is communicating correctly with the sensor.
  4. Clear the DTC from the vehicle's system using a diagnostic scan tool after completing the repair.
  5. Test the parking assist system to verify that the sensor is now functioning properly and providing accurate readings.

Cost to Fix B0955:3B

The typical repair costs for addressing a Parking Assist Front Sensor Left Middle Circuit Self-Test Malfunction can vary depending on the specific cause of the issue. In general, replacing a faulty sensor or repairing wiring harness damage may cost between $200 and $500, including parts and labor. However, if the control module needs to be replaced, the cost could increase to $500-$1000 or more. It's important to factor in diagnostic time and labor rates, which can vary between $80 and $150 per hour at most auto repair shops. Additionally, rates may differ based on location, vehicle make and model, and the complexity of the repair. It's recommended to consult with a professional mechanic for an accurate cost estimate tailored to your specific situation.

What does this mean?

Tech Notes for B0955:3B

B0955:01 Parking Assist Front Sensor Left Middle Circuit Short to Battery

B0955:02 Parking Assist Front Sensor Left Middle Circuit Short to Ground

B0955:04 Parking Assist Front Sensor Left Middle Circuit Open

B0955:06 Parking Assist Front Sensor Left Middle Circuit Low Voltage/Open

B0955:08 Parking Assist Front Sensor Left Middle Circuit Performance - Signal Invalid

B0955:18 Parking Assist Front Sensor Left Middle Circuit Low Signal Amplitude

B0955:21 Parking Assist Front Sensor Left Middle Circuit Incorrect Period

B0955:22 Parking Assist Front Sensor Left Middle Circuit Too Short Low-Time

B0955:3A Parking Assist Front Sensor Left Middle Circuit Incorrect Component Installed

B0955:3B Parking Assist Front Sensor Left Middle Circuit Self-Test Malfunction

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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.

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