2016 jeep grand cherokee auto start stop not working

OP Authors 2025

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16-03-2025

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2016 Jeep Grand Cherokee Auto Start/Stop Not Working: Troubleshooting and Solutions

The auto start/stop system in your 2016 Jeep Grand Cherokee is designed to improve fuel efficiency by automatically shutting off the engine when the vehicle comes to a complete stop and restarting it when you release the brake pedal. However, like any complex system, it can malfunction. If your auto start/stop system isn't working, you're not alone. This article will guide you through troubleshooting the issue and exploring potential solutions.

Why is my Auto Start/Stop Not Working?

Several factors can prevent your 2016 Jeep Grand Cherokee's auto start/stop system from functioning correctly. These include:

• Low Battery: This is the most common culprit. The system requires sufficient battery power to reliably shut down and restart the engine. A weak or failing battery can't handle the repeated cycles, causing the system to disable itself as a safety precaution.
• Faulty Battery Sensor: The system relies on sensors to monitor battery voltage and condition. A malfunctioning sensor might provide inaccurate readings, leading to the system's deactivation.
• Alternator Issues: A weak or failing alternator can't adequately recharge the battery, resulting in insufficient power for the start/stop system.
• Engine Temperature: The system might temporarily disable itself if the engine is too hot or too cold.
• Transmission Issues: Problems with the transmission or related components can also interfere with the start/stop system's operation.
• Brake System Malfunction: The system requires a fully functioning brake system. Issues with the brake pedal position sensor or brake fluid levels can deactivate the system.
• Software Glitch: Sometimes, a software glitch within the vehicle's computer system can cause the start/stop function to fail.
• Accessory Load: Having too many accessories running (e.g., heated seats, headlights, rear defroster) can draw excessive power, preventing the system from functioning.

Troubleshooting Steps:

1. Check the Battery: Have your battery tested at an auto parts store or dealership. A simple voltage test can reveal if your battery is adequately charged and holds its charge. Low voltage or a failing battery is the most likely cause.
2. Inspect the Battery Terminals: Ensure the battery terminals are clean and securely connected. Corrosion can impede the flow of electricity.
3. Check the Auto Start/Stop Button: Make sure the auto start/stop button (usually located on the dashboard) isn't accidentally turned off.
4. Review the Dashboard Warnings: Pay attention to any warning lights illuminated on your dashboard. They might indicate a problem with the battery, alternator, or other relevant systems.
5. Consult the Owner's Manual: Your owner's manual contains specific information about your vehicle's start/stop system and potential troubleshooting steps.
6. Have the System Scanned: Take your Jeep to a mechanic or dealership to have the vehicle's computer system scanned for diagnostic trouble codes (DTCs). This can pinpoint the exact cause of the malfunction.

Solutions:

• Replace the Battery: If the battery test reveals a problem, replace it with a new battery of the correct type and specifications for your 2016 Jeep Grand Cherokee.
• Repair or Replace Faulty Components: If diagnostic testing identifies a problem with the alternator, sensors, or other components, have them repaired or replaced.
• Software Update: A software update from the dealership might resolve software glitches causing the issue.

Prevention:

• Regular Battery Maintenance: Regularly check your battery's condition and terminals.
• Avoid Excessive Accessory Use: Limit the use of power-hungry accessories when the engine is off.

If you've tried these troubleshooting steps and your auto start/stop system still isn't working, it's best to consult a qualified mechanic or Jeep dealership for professional diagnosis and repair. Ignoring the problem could lead to further complications.