AutoCodes – GMC – B0959 2016 GMC Sierra

B0959 2016 GMC Sierra 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 2016 GMC Sierra 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 246

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 02, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B0959 2016 GMC Sierra 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 2016 GMC Sierra - Parking Assist Rear Sensor Left Middle Circuit - AutoCodes.com — B0959 2016 GMC Sierra Code - Parking Assist Rear Sensor Left Middle Circuit

What does this mean?

What are the Possible Causes of the DTC B0959 2016 GMC Sierra?

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 2016 GMC Sierra?

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.

What does this mean?

Code Tech Notes

B0959:01 Parking Assist Rear Sensor Left Middle Circuit Short to Battery
B0959:02 Parking Assist Rear Sensor Left Middle Circuit Short to Ground
B0959:04 Parking Assist Rear Sensor Left Middle Circuit Open
B0959:06 Parking Assist Rear Sensor Left Middle Circuit Low Voltage/Open
B0959:08 Parking Assist Rear Sensor Left Middle Circuit Performance - Signal Invalid
B0959:18 Parking Assist Rear Sensor Left Middle Circuit Low Signal Amplitude
B0959:21 Parking Assist Rear Sensor Left Middle Circuit Incorrect Period
B0959:22 Parking Assist Rear Sensor Left Middle Circuit Too Short Low-Time
B0959:3A Parking Assist Rear Sensor Left Middle Circuit Incorrect Component Installed
B0959:3B Parking Assist Rear Sensor Left Middle Circuit Self-Test Malfunction

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0959 2016 GMC Sierra 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 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code B0959 in a 2016 GMC Sierra related to the Parking Assist Rear Sensor Left Middle Circuit?

- The most common symptoms include a malfunctioning rear parking assist system, audible alerts not working, or a warning light on the dashboard.

2. What are the possible causes of OBDII code B0959 in a 2016 GMC Sierra?

- The code B0959 typically indicates a fault with the rear sensor in the left middle position, which can be caused by sensor damage, wiring issues, or a faulty control module.

3. How can I diagnose the Parking Assist Rear Sensor Left Middle Circuit issue in my 2016 GMC Sierra?

- You can diagnose the problem by visually inspecting the sensor and its wiring for any damage, testing the sensor's functionality, and using an OBDII scanner to read the specific error code.

4. Can I continue driving my 2016 GMC Sierra with the B0959 OBDII code?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to restore the proper functioning of the parking assist system.

5. How can I repair the Parking Assist Rear Sensor Left Middle Circuit problem in my 2016 GMC Sierra?

- Repairing the issue may involve replacing the faulty sensor, repairing damaged wiring, or resetting the control module. It is advisable to consult a professional mechanic for an accurate diagnosis and repair.

6. Is it possible to reset the OBDII code B0959 in a 2016 GMC Sierra without fixing the issue?

- While you can clear the code temporarily using an OBDII scanner, it is crucial to address the underlying problem to prevent the code from reappearing and ensure the proper functioning of the parking assist system.

7. Are there any DIY tips for troubleshooting the B0959 code in a 2016 GMC Sierra?

- DIY tips include checking the sensor connections, cleaning the sensor area, inspecting for any visible damage, and ensuring the sensor is securely mounted.

8. Will fixing the B0959 code in my 2016 GMC Sierra require specialized tools?

- Depending on the exact cause of the issue, fixing the B0959 code may require basic hand tools, an OBDII scanner for diagnostics, and potentially specialized tools for sensor replacement or wiring repairs.

9. How much does it typically cost to repair the Parking Assist Rear Sensor Left Middle Circuit issue in a 2016 GMC Sierra?

- The repair costs can vary depending on the extent of the damage, the need for parts replacement, and labor charges. It is advisable to obtain estimates from different repair shops for an accurate cost assessment.

10. Can extreme weather conditions affect the performance of the rear parking assist system in a 2016 GMC Sierra?

- Yes, extreme weather conditions such as snow, ice, or heavy rain can impact the performance of the parking assist system by obstructing the sensors or causing electrical issues. Regular maintenance and cleaning can help prevent such issues.