AutoCodes – Buick – B0959 Buick

B0959 Buick Code - Parking Assist Rear Sensor Left Middle Circuit

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 Middle, Parking Assist Rear Sensor Left Middle harness is open or shorted, Parking Assist Rear Sensor Left Middle 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
B0959 Buick indicates Parking Assist Rear Sensor Left Middle Circuit.
Common causes
Common causes include Faulty Parking Assist Rear Sensor Left Middle, Parking Assist Rear Sensor Left Middle harness is open or shorted, Parking Assist Rear Sensor Left Middle 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 1,685
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Apr 02, 2023
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Code B0959 Buick 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 Aid Rear Sensor signal to the Parking Assist Control Module is out of specification.
OBDII Code B0959 Buick - Parking Assist Rear Sensor Left Middle Circuit - AutoCodes.com
B0959 Buick Code - Parking Assist Rear Sensor Left Middle Circuit

What are the Possible Causes of the DTC B0959 Buick?

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

How to Fix the DTC B0959 Buick?

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 B0959 Buick 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 B0959 Buick Code

1. What does the OBDII code B0959 mean for a Buick?

Code B0959 indicates a problem with the Parking Assist Rear Sensor Left Middle Circuit, typically related to a malfunction or communication issue with the sensor.

2. What are the common symptoms of a B0959 code in a Buick?

Common symptoms include the parking assist system not functioning properly, warning lights or alerts for the parking assist system, and difficulty detecting objects behind the vehicle.

3. What causes the B0959 code to appear?

Causes can include a faulty rear parking sensor, damaged wiring or connectors, corrosion in the circuit, or a problem with the parking assist control module.

4. Can I still drive my Buick with a B0959 code?

Yes, you can drive the vehicle, but the parking assist system may not function correctly, increasing the risk of backing into objects.

5. How do I diagnose the B0959 code in a Buick?

Diagnosis involves inspecting the affected sensor, checking for loose or damaged wiring, and using a scan tool to confirm the fault and test the parking assist system.

6. How can I fix the B0959 code on a Buick?

Repairs may include replacing the faulty sensor, repairing damaged wiring, cleaning corroded connections, or, in rare cases, replacing the parking assist control module.

7. How much does it cost to repair a B0959 code?

Repair costs vary, but replacing a parking sensor typically ranges from $100 to $300, depending on parts and labor.

8. Can a dirty sensor cause the B0959 code in a Buick?

Yes, dirt, debris, or moisture on the sensor can interfere with its operation and trigger the code. Cleaning the sensor may resolve the issue.

9. Do I need special tools to fix the B0959 code?

Basic tools like a multimeter and a scan tool are often sufficient for diagnosing and repairing this code. Specialized tools may be needed for sensor replacement.

10. Can the B0959 code be cleared without repairs?

Clearing the code without addressing the underlying issue may temporarily remove it, but the problem will likely return until properly fixed.

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