Engine-CodesGMC – B0959 2014 GMC Sierra

B0959 2014 GMC Sierra Code - Parking Assist Rear Sensor Left Middle Circuit

Quick Answer

The B0959 diagnostic trouble code (DTC) for a 2014 GMC Sierra relates to the Parking Assist Rear Sensor Left Middle Circuit. Common causes include Faulty rear parking sensor in the left middle position, Wiring or connection issues in the circuit, Corrosion or damage to the sensor or wiring. 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 rear parking sensor in the left middle position, Wiring or connection issues in the circuit, Corrosion or damage to the sensor or wiring.
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.
Table of contents Created and updated by William Orellana on Sep 15, 2024
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Code B0959 2014 GMC Sierra Description

The B0959 diagnostic trouble code (DTC) for a 2014 GMC Sierra relates to the Parking Assist Rear Sensor Left Middle Circuit. This code indicates that there is a malfunction in the circuit associated with the rear parking sensor located in the middle left side of the vehicle. The parking assist system uses sensors to detect objects behind the vehicle while parking, providing audible or visual alerts to the driver to prevent collisions.

OBDII Code B0959 2014 GMC Sierra - Parking Assist Rear Sensor Left Middle Circuit
B0959 2014 GMC Sierra Code - Parking Assist Rear Sensor Left Middle Circuit

Common Causes of B0959 2014 GMC Sierra

  1. Faulty rear parking sensor in the left middle position.
  2. Wiring or connection issues in the circuit.
  3. Corrosion or damage to the sensor or wiring.
  4. Water intrusion into the sensor or wiring.
  5. Electronic control module (ECM) failure.

Symptoms of B0959 2014 GMC Sierra

  1. Parking assist system not providing accurate distance warnings.
  2. Inability to activate the parking assist system.
  3. Continuous beeping or warning alerts when the vehicle is in reverse.
  4. Malfunction indicator light (MIL) illuminated on the dashboard.

How to Fix B0959 2014 GMC Sierra

  1. Begin by visually inspecting the rear parking sensor in the left middle position for any physical damage or corrosion.
  2. Check the wiring and connections associated with the sensor for any signs of wear, damage, or loose connections.
  3. Test the sensor using a multimeter to determine if it is functioning correctly.
  4. If the sensor is faulty, replace it with a new OEM sensor.
  5. Clear the DTC from the vehicle's ECM using a diagnostic scan tool to reset the system.

Cost to Fix B0959 2014 GMC Sierra

The typical repair costs for addressing a B0959 DTC on a 2014 GMC Sierra can vary depending on the specific cause of the issue. Generally, the cost of a new rear parking sensor can range from $50 to $150, while labor costs for diagnosis and replacement can range from $100 to $300. Overall, the total repair cost for this issue may fall between $150 and $450. It is important to note that labor rates at auto repair shops can vary, so it is advisable to check with local shops for more accurate pricing.

Tech Notes for B0959 2014 GMC Sierra

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

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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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