Engine-CodesGMC – B0959 2015 GMC Sierra

B0959 2015 GMC Sierra Code - Parking Assist Rear Sensor Left Middle Circuit

Quick Answer

The B0959 diagnostic trouble code (DTC) for a 2015 GMC Sierra refers to an issue with the Parking Assist Rear Sensor Left Middle Circuit. Common causes include Damaged wiring or connectors in the sensor circuit, Faulty rear left middle sensor, ECM malfunction. 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 2015 GMC Sierra indicates Parking Assist Rear Sensor Left Middle Circuit.
Common causes
Common causes include Damaged wiring or connectors in the sensor circuit, Faulty rear left middle sensor, ECM malfunction.
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 14, 2024
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Code B0959 2015 GMC Sierra Description

The B0959 diagnostic trouble code (DTC) for a 2015 GMC Sierra refers to an issue with the Parking Assist Rear Sensor Left Middle Circuit. This code indicates that there is a malfunction in the circuit that controls the rear left middle sensor in the parking assist system. The parking assist system uses sensors located around the vehicle to detect obstacles and aid the driver in parking maneuvers. When this specific sensor circuit fails, it can affect the accuracy and reliability of the parking assist system, potentially leading to difficulties in parking and increased risk of collisions.

OBDII Code B0959 2015 GMC Sierra - Parking Assist Rear Sensor Left Middle Circuit
B0959 2015 GMC Sierra Code - Parking Assist Rear Sensor Left Middle Circuit

Common Causes of B0959 2015 GMC Sierra

  1. Damaged wiring or connectors in the sensor circuit
  2. Faulty rear left middle sensor
  3. ECM malfunction
  4. Water or debris intrusion affecting sensor operation
  5. Corrosion or rust affecting sensor performance

Symptoms of B0959 2015 GMC Sierra

  1. Parking assist system not functioning properly
  2. Warning lights or messages related to parking assist system on the dashboard
  3. Difficulty in parking or maneuvering the vehicle in tight spaces
  4. Inaccurate or inconsistent readings from the rear left middle sensor

How to Fix B0959 2015 GMC Sierra

  1. Inspect the wiring and connectors for damage or corrosion
  2. Test the rear left middle sensor for proper operation
  3. Check the ECM for any faults or malfunctions
  4. Replace any faulty components, such as the sensor or ECM
  5. Clear the DTCs and reset the system to ensure proper functionality

Cost to Fix B0959 2015 GMC Sierra

The typical repair costs for addressing the B0959 code on a 2015 GMC Sierra can range from $200 to $500, depending on the extent of the issue and the parts that need to be replaced. This estimate includes the cost of parts, labor, and diagnostic fees. It's important to note that the actual repair costs can vary based on the specific diagnosis time and labor rates at auto repair shops. Rates may also differ based on the location, vehicle make and model, and engine type. It's recommended to obtain quotes from multiple repair facilities to compare prices and ensure a fair deal.

Tech Notes for B0959 2015 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 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code B0959 in a 2015 GMC Sierra related to the Parking Assist Rear Sensor Left Middle Circuit?

- The common symptoms include malfunction or complete failure of the rear parking assist system, specifically the sensor located on the left middle side of the vehicle.

2. What are the possible causes of OBDII code B0959 in a 2015 GMC Sierra?

- The code B0959 typically indicates a fault in the wiring, connections, or the sensor itself of the left middle rear parking assist sensor circuit.

3. How can I diagnose the issue related to OBDII code B0959 in my 2015 GMC Sierra?

- Diagnosis involves checking the wiring harness, connectors, and sensor for any visible damage, corrosion, or loose connections. A multimeter can also be used to test the sensor's functionality.

4. Can I repair the OBDII code B0959 issue in my 2015 GMC Sierra myself?

- Depending on your automotive repair skills, you may be able to repair the issue yourself by fixing any damaged wiring, connectors, or replacing the faulty sensor. However, professional assistance may be needed for complex electrical diagnostics.

5. Is it safe to drive my 2015 GMC Sierra with the OBDII code B0959 related to the Parking Assist Rear Sensor Left Middle Circuit?

- While the vehicle should still be safe to drive, it is recommended to address the issue promptly to ensure the proper functioning of the parking assist system, which can help prevent accidents while parking.

6. Can weather conditions affect the occurrence of OBDII code B0959 in a 2015 GMC Sierra?

- Extreme weather conditions such as heavy rain, snow, or extreme temperatures can potentially damage the wiring or sensor, leading to the triggering of the B0959 trouble code.

7. How much does it typically cost to repair OBDII code B0959 in a 2015 GMC Sierra at a professional auto repair shop?

- The cost of repair can vary depending on the extent of the damage and the labor rates of the repair shop. On average, repairing the Parking Assist Rear Sensor Left Middle Circuit issue can cost a few hundred dollars.

8. Will resetting the OBDII code B0959 in my 2015 GMC Sierra make the issue go away permanently?

- Resetting the code may temporarily remove the warning light, but if the underlying issue with the sensor circuit is not fixed, the code is likely to return. It is important to diagnose and repair the root cause of the problem.

9. Can a faulty OBDII code B0959 affect other systems in my 2015 GMC Sierra?

- While the B0959 code specifically relates to the Parking Assist Rear Sensor Left Middle Circuit, a faulty sensor or wiring issue could potentially impact the overall performance of the rear parking assist system in the vehicle.

10. Are there any preventive measures I can take to avoid encountering OBDII code B0959 in my 2015 GMC Sierra?

- Regularly inspecting the parking assist sensors, keeping them clean, and addressing any visible wiring issues promptly can help prevent the occurrence of the B0959 trouble code in your GMC Sierra.

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