Troubleshooting Auto Start Issue in 2016-2019 Honda Pilots
Table of Contents
- Introduction
- Overview of the Auto Stop Start Feature
- Common Issues with the Auto Stop Start Feature
- Checking the Battery
- Inspecting the Terminals for Corrosion
- Software Update for the PCM
- Performing a Valve Adjustment
- Possible Causes for Persistent Issues
- Importance of Professional Assistance
- Conclusion
Introduction
In this article, we will be addressing a common issue faced by owners of 2016 to 2022 Honda Pilots. Specifically, we will discuss the problems related to the Auto Stop Start feature found in these vehicles. The Auto Stop Start feature is designed to automatically shut off the engine when the vehicle comes to a stop, such as at a stop sign or a red light. While this feature is meant to improve fuel efficiency and reduce emissions, it has been causing concerns among drivers as some cars experience difficulties restarting after the engine has shut off. In this article, we will explore the possible causes of this issue and discuss the solutions to resolve it. So, if you're a Honda Pilot owner experiencing problems with the Auto Stop Start feature, keep reading to find out how you can address this issue effectively.
Overview of the Auto Stop Start Feature
The Auto Stop Start feature is a function that allows the engine of a vehicle to automatically shut off when the car comes to a complete stop. This feature aims to reduce fuel consumption and limit emissions by minimizing the amount of time the engine idles. By shutting off the engine during brief stops, such as traffic lights, the Auto Stop Start feature is intended to provide fuel efficiency and contribute to a greener driving experience.
Common Issues with the Auto Stop Start Feature
However, some Honda Pilot owners have reported encountering problems with the Auto Stop Start feature. The most significant issue is that the engine fails to restart after it has shut off, leading to moments of panic and potential safety hazards. This can be extremely frustrating for drivers, especially when they are anticipating a green light or trying to navigate through traffic. These intermittent issues not only inconvenience the driver but also pose a risk of accidents and delays.
Checking the Battery
One of the first steps in troubleshooting the Auto Stop Start issue is to check the battery. Batteries that are two to three years old may have reduced capacity, making it difficult for them to provide sufficient power to restart the engine. To test the battery, it is recommended to use a battery tester. However, if a tester is not available, a simple check can be performed by turning on the lights and the blower motor for about five minutes and then rechecking the battery. If the battery fails this test, it should be replaced.
Pros:
- Checking the battery helps identify if the issue lies with battery health.
- It is a relatively easy and inexpensive solution if the battery is found to be faulty.
Cons:
- Replacing the battery will incur additional costs if it is not covered by warranty.
- Battery replacement does not guarantee a resolution if the issue is caused by other factors.
Inspecting the Terminals for Corrosion
Another possible cause of the Auto Stop Start problem is corrosion on the battery terminals. Corrosion can hinder the flow of electricity and prevent the battery from delivering the necessary power to restart the engine. To inspect the terminals, it is essential to remove any covers or clips that may be obstructing access. After ensuring that there is no corrosion present, give the terminals a twist to check for any movement. If corrosion is detected, it should be thoroughly cleaned or addressed to ensure proper electrical connections.
Pros:
- Corrosion on the battery terminals can be a common issue, making it relatively easy to identify and fix.
- Cleaning the terminals can improve electrical conductivity and potentially resolve the Auto Stop Start problem.
Cons:
- Corrosion may not be the underlying cause of the issue in all cases.
- If corrosion is severe or persistent, it may require professional assistance or replacement of the terminals.
Software Update for the PCM
A software update for the Powertrain Control Module (PCM) is another recommended step to address the Auto Stop Start issue. This update involves tightening the parameters that control the Auto Stop feature, reducing its frequency and minimizing occurrences of the engine failing to restart. Updating the PCM can be done by a professional technician or at a certified Honda service center. It is important to follow the manufacturer's guidelines and use the appropriate software version to ensure compatibility and effectiveness.
Pros:
- Updating the PCM software is a non-invasive solution that can potentially resolve the Auto Stop Start problem.
- It helps optimize the performance of the Auto Stop Start feature and reduces the chances of engine restart failure.
Cons:
- PCM updates may not be available for older Honda Pilot models.
- If the software update does not resolve the issue, further investigation and diagnostics may be necessary.
Performing a Valve Adjustment
If the above steps do not resolve the Auto Stop Start issue, a valve adjustment may be required. In some cases, overly loose valves can interfere with the engine's ability to restart after the Auto Stop feature engages. To perform a valve adjustment, it is essential to ensure that the engine is as cold as possible. The valve lash should be set to the middle of the manufacturer's specifications to ensure optimal performance.
Pros:
- Adjusting the valve lash can address valve-related issues that may cause the engine restart problem.
- It is a more involved process but can be an effective solution if other steps have not resolved the issue.
Cons:
- Performing a valve adjustment requires technical skill and knowledge, making it unsuitable for inexperienced individuals.
- If the valve adjustment does not resolve the issue, further investigation or professional assistance may be necessary.
Possible Causes for Persistent Issues
In some cases, the Auto Stop Start problem may persist despite performing the recommended solutions. If this occurs, there could be other underlying causes that require further investigation. Possible factors contributing to the issue may include a faulty starter motor or other mechanical or electrical malfunctions. At this point, it is crucial to seek professional assistance from a qualified technician who can diagnose and address the specific problem.
Importance of Professional Assistance
While some of the solutions mentioned in this article can be performed by car owners themselves, it is important to note that seeking professional assistance is highly recommended, especially if the issue persists. Trained technicians have the expertise and equipment to diagnose and fix complex engine-related problems effectively. Attempting to resolve the issue without the necessary knowledge and experience may lead to further damage or frustration.
Conclusion
The Auto Stop Start feature in 2016 to 2022 Honda Pilots provides a convenient way to save fuel and reduce emissions. However, some owners have encountered difficulties with the engine restarting after it shuts off. By following the steps outlined in this article, including checking the battery, inspecting the terminals, performing a software update, and considering a valve adjustment, owners can take the necessary actions to resolve the Auto Stop Start issue. If these steps do not yield satisfactory results, it is essential to consult a professional technician for accurate diagnosis and appropriate solutions.
Highlights
- The Auto Stop Start feature in Honda Pilots is causing concern due to engine restart issues after the engine has shut off.
- Problems with the Auto Stop Start feature can lead to safety hazards and frustration for drivers.
- Checking the battery, inspecting terminals for corrosion, performing a software update for the PCM, and a valve adjustment are potential solutions to address the issue.
- Professional assistance is recommended if the issue persists or if performing the suggested steps is beyond the car owner's expertise.
Frequently Asked Questions
Q: Can I disable the Auto Stop Start feature in my Honda Pilot?
A: Yes, the Auto Stop Start feature can usually be temporarily disabled by pressing a dedicated button on the shifter panel. However, keep in mind that disabling this feature may affect fuel efficiency and emissions.
Q: How long does the Auto Stop Start feature typically keep the engine off?
A: The duration of engine shutdown in the Auto Stop Start feature can vary depending on various factors such as battery charge, ambient conditions, and system parameters. In most cases, the engine remains off for a few seconds before automatically restarting.
Q: Will disabling the Auto Stop Start feature impact the vehicle's warranty?
A: Generally, disabling the Auto Stop Start feature on a Honda Pilot should not affect the vehicle's warranty. However, it is recommended to consult the vehicle's owner's manual or contact a certified Honda service center for specific warranty details.
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