AutoCodes – GMC – B0959 2017 GMC Sierra

B0959 2017 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 2017 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 358

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 2017 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 2017 GMC Sierra - Parking Assist Rear Sensor Left Middle Circuit - AutoCodes.com — B0959 2017 GMC Sierra Code - Parking Assist Rear Sensor Left Middle Circuit

What does this mean?

What are the Possible Causes of the DTC B0959 2017 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 2017 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 2017 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 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code B0959 in a 2017 GMC Sierra related to the Parking Assist Rear Sensor Left Middle Circuit?

- Common symptoms may include a malfunctioning rear parking assist system, warning lights on the dashboard, and audible alerts not working properly.

2. What are the possible causes of OBDII code B0959 in a 2017 GMC Sierra?

- The code B0959 can be triggered by issues such as damaged wiring, faulty sensors, corrosion, or other electrical problems within the parking assist system.

3. How can I diagnose the Parking Assist Rear Sensor Left Middle Circuit issue in my 2017 GMC Sierra?

- A diagnostic scanner capable of reading OBDII codes can help pinpoint the exact cause of the problem. Checking the wiring connections and sensor functionality is also recommended.

4. Can I still drive my 2017 GMC Sierra with the B0959 code related to the Parking Assist Rear Sensor Left Middle Circuit?

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

5. How can I repair the Parking Assist Rear Sensor Left Middle Circuit problem in my 2017 GMC Sierra?

- Repairing the issue may involve fixing or replacing damaged wiring, replacing faulty sensors, cleaning corroded connectors, or resetting the system with a diagnostic tool.

6. Are there any DIY tips for fixing the OBDII code B0959 in a 2017 GMC Sierra?

- While some basic checks like inspecting wiring connections can be done by DIY enthusiasts, complex repairs and sensor replacements may require professional assistance to ensure proper functioning.

7. Will resetting the OBDII code B0959 in my 2017 GMC Sierra make the issue go away permanently?

- Resetting the code may temporarily clear the warning lights, but if the underlying problem in the Parking Assist Rear Sensor Left Middle Circuit is not fixed, the code is likely to reappear.

8. How much does it typically cost to repair the Parking Assist Rear Sensor Left Middle Circuit issue in a 2017 GMC Sierra?

- Repair costs can vary depending on the extent of the damage and whether components need replacement. It is advisable to consult a mechanic for an accurate estimate.

9. Can extreme weather conditions affect the triggering of OBDII code B0959 in a 2017 GMC Sierra?

- Yes, extreme weather conditions like heavy rain or snow can potentially damage the sensors or wiring, leading to issues with the parking assist system and triggering the B0959 code.

10. Is it possible to prevent the recurrence of OBDII code B0959 in a 2017 GMC Sierra after repairs?

- Regular maintenance checks, keeping the sensors clean, and addressing any wiring issues promptly can help prevent the reoccurrence of the B0959 code related to the Parking Assist Rear Sensor Left Middle Circuit.