AutoCodes – GMC – P0562 2016 GMC Sierra

P0562 2016 GMC Sierra Code - System Voltage Low

Quick Answer

The Powertrain Control Module (PCM) continuously monitors the system voltage. Common causes include Low battery charge, Battery defective, Loose or missing alternator drive belt. 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: P0562 2016 GMC Sierra indicates System Voltage Low.
Common causes: Common causes include Low battery charge, Battery defective, Loose or missing alternator drive belt.
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.

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Code Popularity 281

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 04, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0562 2016 GMC Sierra Description

The Powertrain Control Module (PCM) continuously monitors the system voltage. The system voltage information is taken from the PCM's ignition feed circuits. Voltages below 8.0 volts or above 17.1 volts cause improper system operation and/or component damage. If the system voltage is low the PCM raises the idle speed in order to increase the generator output. The PCM disables most outputs to protect the hardware if the system voltage is high. A scan tool may not display data if system voltage is outside this range. The Diagnostic Trouble Code (DTC) will be set if the PCM detects a too low electrical system voltage level.

OBDII Code P0562 2016 GMC Sierra - System Voltage Low - AutoCodes.com — P0562 2016 GMC Sierra Code - System Voltage Low

What does this mean?

What are the Possible Causes of the DTC P0562 2016 GMC Sierra?

Low battery charge
Battery defective
Loose or missing alternator drive belt
Faulty alternator
Open or short system voltage circuit

How to Fix the DTC P0562 2016 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

Start by recharging or replacing the battery.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0562 2016 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 P0562 2016 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 P0562 2016 GMC Sierra Code

1. What does the OBDII code P0562 mean for a 2016 GMC Sierra?

P0562 indicates "System Voltage Low," meaning the vehicle's electrical system is operating below the required voltage level.

2. What are common symptoms of code P0562 in a GMC Sierra?

Symptoms include dim headlights, weak or no engine cranking, battery warning light illumination, stalling, or erratic electronic accessory behavior.

3. What causes the P0562 code to appear?

Common causes include a failing alternator, a weak or damaged battery, corroded or loose battery terminals, or wiring issues in the charging system.

4. Can driving with the P0562 code damage my 2016 GMC Sierra?

Yes, prolonged driving with low system voltage can lead to further electrical issues, loss of power to critical systems, or even sudden stalling.

5. How can I diagnose the P0562 code?

Start by checking the battery voltage, inspecting battery terminals for corrosion, testing the alternator output, and examining wiring for damage.

6. How do I fix code P0562 in my GMC Sierra?

Repairs may include replacing the battery, repairing damaged wiring, cleaning battery terminals, or replacing a faulty alternator.

7. Can a bad alternator cause the P0562 code?

Yes, a failing alternator is a common cause of low system voltage and can trigger the P0562 code.

8. What should the battery voltage be when the engine is running?

The voltage should typically be between 13.5 and 14.7 volts when the engine is running. Anything significantly lower may indicate a charging system issue.

9. Will clearing the P0562 code fix the problem?

Clearing the code does not fix the underlying issue. The root cause, such as a failing alternator or battery problem, must be addressed to prevent the code from returning.

10. How much does it cost to repair the P0562 code on a GMC Sierra?

Repair costs vary depending on the issue, ranging from $50 for battery terminal cleaning to $300â€“$800 for alternator replacement.