The 2017 Chrysler Pacifica is equipped with an Auto Start Stop feature designed to enhance fuel efficiency by automatically turning off the engine during idling periods. However, when the Auto Start Stop light illuminates on the dashboard, it indicates a potential issue with this system. This guide will help owners understand the causes and solutions for this warning light.

Understanding the Auto Start Stop System

The Auto Start Stop system, also known as Idle Stop-Start System (ISS), conserves fuel by shutting off the engine when the vehicle comes to a stop and restarting it when the accelerator is pressed. This feature is beneficial for reducing emissions and improving fuel economy.

Common Causes of the Warning Light

The Auto Start Stop warning light can be triggered by several factors:

  • Battery Issues: The most common cause is a low charge in either the main or auxiliary battery. The Pacifica uses both batteries to operate the start-stop system effectively.
  • Battery Management System Malfunction: If there are issues with the battery management system, it may not correctly assess battery conditions, leading to warnings.
  • Software Glitches: Occasionally, software errors can cause the system to malfunction, resulting in warning lights.
  • Environmental Conditions: Extreme temperatures can affect battery performance and system functionality.

Troubleshooting Steps

If you encounter the Auto Start Stop light, consider following these troubleshooting steps:

  • Check Battery Health: Inspect both the main and auxiliary batteries. A fully charged battery should read about 12.5-12.6 volts when off and 13.7-14.5 volts when running.
  • Replace Batteries if Necessary: If either battery shows signs of weakness, consider replacing both, as they work in tandem for the start-stop system to function correctly.
  • Inspect Battery Connections: Ensure that all battery terminals are clean and securely connected. Corroded or loose connections can disrupt power flow.
  • Reset the System: Disconnect both batteries for at least 15 minutes to reset the system. Reconnect them in order—auxiliary first, then main—and check if the warning light persists.
  • Consult a Professional: If issues continue after checking batteries and connections, it may be necessary to visit a dealership for a comprehensive diagnostic check.

Important Considerations

Operating your Chrysler Pacifica with the Auto Start Stop warning light on is generally safe; however, it is crucial to address the underlying issue promptly to avoid further complications.

FAQs About Auto Start Stop Light

FAQs About 2017 Chrysler Pacifica Auto Start Stop Light

  • What should I do if my Auto Start Stop light comes on?
    Check your batteries’ health and connections first. If problems persist, consult a professional.
  • Can I drive my Pacifica with this warning light on?
    Yes, but it’s advisable to resolve any underlying issues as soon as possible.
  • How often should I replace my batteries?
    Batteries should be checked regularly, especially if they are over three years old or showing signs of weakness.

By understanding these aspects of your Chrysler Pacifica’s Auto Start Stop system, you can effectively troubleshoot and maintain your vehicle’s performance.