AutoCodes – GMC – B0959 2014 GMC Sierra

B0959 2014 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 2014 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 299
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 2014 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 2014 GMC Sierra - Parking Assist Rear Sensor Left Middle Circuit - AutoCodes.com
B0959 2014 GMC Sierra Code - Parking Assist Rear Sensor Left Middle Circuit

What are the Possible Causes of the DTC B0959 2014 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 2014 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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0959 2014 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.

Need more information about the B0959 2014 GMC Sierra code?

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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 2014 GMC Sierra Code

What does the OBDII code B0959 mean for a 2014 GMC Sierra?

B0959 indicates a problem with the parking assist rear sensor left middle circuit, which may affect the vehicle's ability to detect obstacles while reversing.

What are the common symptoms associated with the B0959 code?

Common symptoms include a malfunctioning parking assist system, warning lights on the dashboard, and the inability of the sensors to detect objects behind the vehicle.

What could cause the B0959 code to trigger?

Possible causes include a faulty rear parking assist sensor, damaged wiring or connectors in the circuit, or issues with the parking assist control module.

How can I diagnose the issue related to the B0959 code?

Start by visually inspecting the wiring and connectors for damage, then use a multimeter to check for continuity in the circuit. You can also test the sensor's functionality using a scan tool.

What repairs might be needed if the B0959 code is present?

Repairs may involve replacing the faulty parking assist sensor, repairing damaged wiring, or replacing the parking assist control module if it is determined to be defective.

Can I clear the B0959 code without fixing the problem?

Yes, you can clear the code using an OBDII scanner, but if the underlying issue is not resolved, the code will likely return after a short period of driving.

Is it safe to drive a vehicle with the B0959 code?

While it may be safe to drive, the lack of functioning parking assistance may increase the risk of backing into obstacles, so caution is advised until the issue is resolved.

How can I prevent the B0959 code from recurring?

Regularly inspect and maintain the parking assist system, keeping sensors clean and ensuring wiring is intact can help prevent future issues related to this code.

Should I consult a professional mechanic for the B0959 code?

If you're not comfortable diagnosing or repairing the issue yourself, it's advisable to consult a professional mechanic who can accurately diagnose and fix the problem.

Discuss the causes and fixes for B0959 2014 GMC Sierra OBDII Code

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