AutoCodes – Generic – B0958:3B

B0958:3B Code - Parking Assist Rear Sensor Left Corner Circuit Self-Test Malfunction

Quick Answer

The parking assist sensors are 3-wire ultrasonic sensors that are used to determine the distance between the vehicle and an object. Common causes include Faulty Parking Assist Rear Sensor Left Corner, Parking Assist Rear Sensor Left Corner harness is open or shorted, Parking Assist Rear Sensor Left Corner 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
B0958:3B indicates Parking Assist Rear Sensor Left Corner Circuit Self-Test Malfunction.
Common causes
Common causes include Faulty Parking Assist Rear Sensor Left Corner, Parking Assist Rear Sensor Left Corner harness is open or shorted, Parking Assist Rear Sensor Left Corner 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 176
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Apr 03, 2023
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Code B0958:3B Description

The parking assist sensors are 3-wire ultrasonic sensors that are used to determine the distance between the vehicle and an object. The Parking Assist Control Module supplies 12 V to the parking assist sensors via the 12 V reference circuit and provides ground via the low reference circuit. The Parking Assist Control Module triggers the sensors in a sequential loop. After each sensor transmits, the Parking Assist Control Module uses the sensor echo received through the signal circuit to calculate the distance and position of an object. The Diagnostic Trouble Code (DTC) will be set when the Parking Assist Control Module determines the sensor self-test has not successfully completed.
OBDII Code B0958:3B - Parking Assist Rear Sensor Left Corner Circuit Self-Test Malfunction - AutoCodes.com
B0958:3B Code - Parking Assist Rear Sensor Left Corner Circuit Self-Test Malfunction

What are the Possible Causes of the DTC B0958:3B?

  • Faulty Parking Assist Rear Sensor Left Corner
  • Parking Assist Rear Sensor Left Corner harness is open or shorted
  • Parking Assist Rear Sensor Left Corner circuit poor electrical connection
  • Faulty Parking Assist Control Module

How to Fix the DTC B0958:3B?

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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0958:3B 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.

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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.

Frequently Asked Questions about B0958:3B Code

1. What does OBDII code B0958:3B mean?

Code B0958:3B indicates a self-test malfunction in the circuit for the parking assist rear sensor located at the left corner of the vehicle.

2. What are the common symptoms of code B0958:3B?

Common symptoms include the parking assist system not functioning, warning lights or messages on the dashboard, and lack of audible beeps when reversing near obstacles.

3. What causes code B0958:3B to be triggered?

This code can be caused by damaged wiring, a faulty left corner parking sensor, poor electrical connections, or a malfunction in the parking assist module.

4. Can I still drive my vehicle with code B0958:3B?

Yes, the vehicle can still be driven, but the parking assist system may not function properly, increasing the risk of collisions when reversing.

5. How do I diagnose code B0958:3B?

Diagnose this code by inspecting the left rear corner sensor, checking the wiring and connectors for damage, and using a diagnostic scan tool to test the parking assist system.

6. How do I fix code B0958:3B?

Repairs may include replacing the faulty left corner parking sensor, repairing damaged wiring, cleaning corroded connectors, or reprogramming the parking assist module.

7. How much does it cost to fix code B0958:3B?

Repair costs vary but typically range from $100 to $300, depending on whether the sensor, wiring, or module needs replacement or repair.

8. Can a dirty sensor cause code B0958:3B?

Yes, dirt, debris, or moisture on the left corner parking sensor can interfere with its operation and trigger this code.

9. Do I need to replace the parking sensor to fix code B0958:3B?

Not always. First, try cleaning the sensor and checking the wiring. If the issue persists, the sensor may need replacement.

10. Is code B0958:3B related to other parking assist codes?

Yes, it may occur alongside other parking assist codes if there are multiple sensor or system-wide issues in the parking assist system.

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