2018 jeep cherokee auto stop/start not working

OP Authors 2025

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16-03-2025

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2018 Jeep Cherokee Auto Stop/Start System Malfunction: Troubleshooting and Solutions

The auto stop/start system in your 2018 Jeep Cherokee, while designed to improve fuel economy, can sometimes malfunction. If your system isn't working as expected, you're not alone. This article will explore common reasons why your 2018 Jeep Cherokee's auto stop/start might be failing and offer potential solutions.

Understanding the Auto Stop/Start System

Before diving into troubleshooting, let's briefly review how the system functions. The auto stop/start system automatically shuts off the engine when the vehicle comes to a complete stop (e.g., at a red light) and restarts it when you release the brake pedal. This minimizes idling time, contributing to better fuel efficiency. However, the system won't activate under certain conditions, such as:

• Low battery: Insufficient battery charge prevents the system from functioning correctly.
• Extreme temperatures: Both very hot and very cold temperatures can affect the system's operation.
• High engine load: If the engine needs extra power (e.g., running the air conditioning on a hot day), the system might not engage.
• Steep incline or decline: The system typically disables itself on hills to ensure safe operation.
• Active safety systems: If certain safety features are engaged (like stability control), the stop/start function may be temporarily deactivated.

Troubleshooting Your Non-Functional Auto Stop/Start System

If your 2018 Jeep Cherokee's auto stop/start system isn't working, here's a systematic approach to troubleshooting:

1. Check the Battery: This is the most common culprit. A weak or failing battery can prevent the system from operating. Have your battery tested at an auto parts store or dealership. Low voltage can be detected even if the car still starts. Consider replacing the battery if necessary. A battery specifically designed for stop/start systems is recommended.

2. Check the System's On/Off Switch: Many Jeep Cherokees have a button to manually disable or enable the auto stop/start feature. Make sure the system isn't manually turned off. The location of this switch varies depending on your trim level; consult your owner's manual.

3. Examine the Engine's Condition: Issues with the engine itself, such as low oil levels or other mechanical problems, can prevent the system from engaging. Consult your owner's manual and check all fluid levels.

4. Check for Diagnostic Trouble Codes (DTCs): A professional mechanic can use a scan tool to check for any error codes related to the auto stop/start system. This can pinpoint the exact cause of the malfunction.

5. Consider Environmental Factors: Extreme temperatures, as mentioned above, can affect the system. If the problem only occurs in extreme heat or cold, it may resolve itself once the temperature is more moderate.

6. Review Your Owner's Manual: Your owner's manual will provide specific information about your vehicle's auto stop/start system and its operating parameters.

When to Seek Professional Help

If you've gone through these troubleshooting steps and the auto stop/start system still isn't working, it's best to consult a qualified mechanic or Jeep dealership. They have the diagnostic equipment and expertise to accurately diagnose and repair any underlying issues. Ignoring the problem could lead to more significant issues down the line.

Disclaimer: This article provides general information and troubleshooting tips. Specific solutions may vary depending on your Jeep Cherokee's trim level and condition. Always consult your owner's manual and seek professional assistance if needed.