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P0560 2014 GMC Sierra Code - System Voltage Malfunction

Quick Answer

The P0560 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a system voltage malfunction. Common causes include Faulty alternator not charging the battery properly, Weak or failing battery unable to maintain the required voltage levels, Loose or corroded battery connections impeding the flow of electricity. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0560 2014 GMC Sierra indicates System Voltage Malfunction.
Common causes
Common causes include Faulty alternator not charging the battery properly, Weak or failing battery unable to maintain the required voltage levels, Loose or corroded battery connections impeding the flow of electricity.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code P0560 2014 GMC Sierra Description

The P0560 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a system voltage malfunction. This code is triggered when the Powertrain Control Module (PCM) detects that the vehicle's voltage levels are outside the normal operating range. The system voltage is crucial for the proper functioning of various electrical components in the vehicle, including the ignition system, fuel injection system, and other critical systems.

OBDII Code P0560 2014 GMC Sierra - System Voltage Malfunction
P0560 2014 GMC Sierra Code - System Voltage Malfunction

Common Causes of P0560 2014 GMC Sierra

  1. Faulty alternator not charging the battery properly.
  2. Weak or failing battery unable to maintain the required voltage levels.
  3. Loose or corroded battery connections impeding the flow of electricity.
  4. Issues with the voltage regulator regulating the voltage output.

Symptoms of P0560 2014 GMC Sierra

  1. Dim or flickering lights on the dashboard or exterior of the vehicle.
  2. Difficulty starting the vehicle, especially in cold weather.
  3. Erratic engine performance, such as stalling or rough idling.
  4. Electrical components not functioning correctly, such as power windows or radio.

How to Fix P0560 2014 GMC Sierra

  1. Begin by checking the battery and alternator using a multimeter to ensure they are functioning correctly.
  2. Inspect the battery connections for any signs of corrosion or looseness and clean/tighten them as needed.
  3. Test the voltage regulator to determine if it is functioning properly and replace if necessary.
  4. If the alternator is faulty, replace it with a new one to ensure proper charging of the battery.
  5. Clear the DTC with a diagnostic scanner after completing the repairs to reset the system and monitor for any recurring issues.

Cost to Fix P0560 2014 GMC Sierra

The typical repair costs for a system voltage malfunction can range from $200 to $600, depending on the specific cause of the issue and the cost of parts and labor in your area. It's important to note that diagnosis time and labor rates at auto repair shops can vary, with rates typically ranging from $80 to $150 per hour. It's advisable to check with local shops for a more accurate estimate based on your vehicle make and model.

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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 P0560 2014 GMC Sierra Code

What does the OBDII code P0560 mean on a 2014 GMC Sierra?

1. P0560 indicates a "System Voltage Malfunction," meaning the powertrain control module (PCM) has detected an abnormal voltage level in the vehicle's electrical system. 2.

What are the common symptoms of the P0560 code in a 2014 GMC Sierra?

Symptoms may include dim or flickering headlights, issues with starting the vehicle, erratic gauge readings, trouble codes for other systems, or the battery warning light illuminated on the dashboard. 3.

What causes the P0560 code in a 2014 GMC Sierra?

Common causes include a failing alternator, a defective battery, corroded or loose battery terminals, damaged wiring or connectors in the charging system, or a faulty PCM. 4.

Can a bad alternator cause the P0560 code?

Yes, a failing alternator that cannot maintain proper voltage levels is one of the most common causes of the P0560 code. 5.

How do I diagnose the P0560 code on my 2014 GMC Sierra?

Start by checking the battery voltage with a multimeter, inspect battery terminals and connections, test the alternator output, and check for damaged wiring or connectors in the charging system. 6.

Can a weak battery trigger the P0560 code?

Yes, a weak or failing battery that cannot provide sufficient voltage can cause the PCM to detect a system voltage malfunction. 7.

Is it safe to drive with the P0560 code on my 2014 GMC Sierra?

Driving with this code can risk causing further electrical damage or leaving you stranded if the battery dies. It’s best to address the issue promptly. 8.

How do I fix the P0560 code on a 2014 GMC Sierra?

Repairs may include replacing a failing alternator, installing a new battery, cleaning or tightening battery terminals, repairing damaged wiring, or updating/reprogramming the PCM if needed. 9.

Can a blown fuse cause the P0560 code?

While less common, a blown fuse in the charging or electrical system can disrupt voltage regulation and trigger this code. 10.

How much does it cost to fix the P0560 code on a 2014 GMC Sierra?

The cost depends on the cause. Replacing a battery may cost $100-$200, an alternator $300-$600, while wiring or PCM repairs vary widely. Always get a proper diagnosis to avoid unnecessary repairs.

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