Skip to content
Home » How to Effortlessly Resolve a P1639 Code and Regain Control

How to Effortlessly Resolve a P1639 Code and Regain Control

How to Effortlessly Resolve a P1639 Code and Regain Control

The p1639 code can be fixed by resetting the ecm and checking the wiring connections. If you are experiencing this error in your vehicle, it is important to follow these steps for a successful resolution.

Introducing an error code in your vehicle’s diagnostic system can be frustrating and worrisome. The p1639 code specifically relates to a problem with the ecm (engine control module). This error code indicates that there is a malfunction in the ecm’s keep-alive memory circuit.

When this occurs, it can lead to issues with engine performance and efficiency. However, with the right steps, you can easily fix this problem yourself. By resetting the ecm and checking the wiring connections, you can clear the code and resolve the issue. We will guide you through the process of fixing a p1639 code, enabling you to get your vehicle back on the road without any trouble.

How to Effortlessly Resolve a P1639 Code and Regain Control


Understanding The P1639 Code

If you’re experiencing issues with your vehicle and have come across the p1639 code, it’s important to understand what it means and how to address it. This code specifically points to a problem with the vehicle’s pcm (powertrain control module) or ecm (engine control module) memory checksum error.

Understanding the p1639 code will help you diagnose and fix the issue effectively.

What Is The P1639 Code?

The p1639 code refers to a memory checksum error in the pcm or ecm of your vehicle. Here are the key points to understand about this code:

  • The p1639 code is usually triggered when the pcm or ecm detects an error in the memory checksum, which is used to ensure the accuracy and integrity of the module’s memory data.
  • This code can be found in vehicles from various manufacturers, including ford, general motors, and chrysler, among others.
  • The p1639 code often indicates a fault in the programming or a hardware issue within the pcm or ecm module.

Common Symptoms Associated With P1639 Code

Whenever a vehicle displays the p1639 code, it can exhibit various symptoms. While these symptoms may vary depending on the vehicle make and model, here are the most common ones associated with the p1639 code:

  • Check engine light (cel) or malfunction indicator lamp (mil) illuminated on the dashboard.
  • Engine may experience a decrease in performance or power.
  • Transmission might exhibit abnormal shifting patterns.
  • Vehicle may experience difficulty starting or may fail to start at all.

Possible Causes Of The P1639 Code

To effectively fix the p1639 code, it’s crucial to identify its potential causes. Here are some possible reasons why the p1639 code may be triggered:

  • Faulty pcm or ecm: A malfunctioning or damaged pcm or ecm can cause the memory checksum error and trigger the p1639 code.
  • Poor electrical connection: Loose or corroded electrical connections between the pcm or ecm and other components can cause communication errors and trigger the p1639 code.
  • Software or programming issues: Incorrect or outdated software, programming errors, or a failed update can lead to a memory checksum error and trigger the p1639 code.
  • Faulty wiring or harness: Damaged or faulty wiring and harnesses within the pcm or ecm circuitry can cause communication errors and result in the p1639 code.

These are just a few of the possible causes of the p1639 code, and a thorough diagnosis is necessary to pinpoint the exact issue in your specific vehicle.

Remember, it’s always recommended to seek professional assistance or consult a qualified mechanic when dealing with diagnostic trouble codes like p1639. They have the expertise and tools necessary to accurately diagnose and fix the issue, ensuring your vehicle runs smoothly and reliably.

Step-By-Step Guide To Resolving The P1639 Code

If you’ve encountered the p1639 code on your vehicle, don’t panic. While it may seem like a daunting task, with the right tools and a systematic approach, you can resolve the issue without breaking a sweat. In this guide, we will take you through the step-by-step process of fixing the p1639 code, ensuring your vehicle runs smoothly once again.

Gathering The Necessary Tools And Equipment

Before diving into the troubleshooting process, it is essential to gather the necessary tools and equipment to make the task more efficient. Here are the items you’ll need:

  • Obd-ii scanner: This device will help you read and diagnose the p1639 code.
  • Basic toolkit: Including screwdrivers, pliers, and wrenches for removing and installing components.
  • Multimeter: Used to measure electrical voltage and resistance.
  • Replacement parts: Depending on the cause of the code, you may need to acquire new batteries, alternators, solenoids, or ignition switches.

Identifying The Affected Vehicle Components

Once you have your tools ready, the next step entails identifying the specific vehicle components affected by the p1639 code. These may include:

  • Batteries: The code could be triggered by faulty batteries or connections.
  • Alternator and voltage regulator: Malfunctions in these components may also result in the error code.
  • Starter solenoid: A faulty solenoid can lead to the p1639 code.
  • Ignition switch and wiring: Damaged or worn-out switches and wiring may cause the issue as well.

Troubleshooting The Potential Causes Of The P1639 Code

With the affected components identified, it’s time to dive into troubleshooting. Here’s what you need to do:

  • Checking the battery and electrical connections:
  • Inspect the battery for any signs of damage or corrosion.
  • Verify the battery’s voltage using a multimeter.
  • Examine the electrical connections, ensuring they are secure and free of debris.
  • Inspecting the alternator and voltage regulator:
  • Check the alternator belt for proper tension and functionality.
  • Test the alternator’s output voltage and ensure it meets the manufacturer’s specifications.
  • Examine the voltage regulator for any signs of malfunction or damage.
  • Verifying the condition of the starter solenoid:
  • Inspect the solenoid for loose wires, corrosion, or any visible damage.
  • Test the solenoid using a multimeter to ensure it is functioning correctly.
  • Examining the ignition switch and wiring:
  • Check the ignition switch for any signs of wear or damage.
  • Inspect the wiring connected to the ignition switch, searching for loose connections or frayed wires.

Implementing The Appropriate Fixes For Resolving The P1639 Code

After troubleshooting and identifying the root cause of the p1639 code, it’s time to implement the necessary fixes. Here are the common resolutions:

  • Replacing faulty batteries or repairing connections:
  • If the batteries are faulty, replace them with new ones.
  • Clean and secure any loose or corroded electrical connections.
  • Repairing or replacing the alternator and voltage regulator:
  • If the alternator is malfunctioning, repair or replace it accordingly.
  • Address any issues with the voltage regulator, either repairing or replacing it as needed.
  • Repairing or replacing the starter solenoid:
  • Fix the solenoid by repairing loose wires or replacing the entire component if necessary.
  • Repairing or replacing the ignition switch and wiring:
  • Repair any damage to the ignition switch or wiring, or replace them if required.

By following this step-by-step guide and addressing each potential cause, you can successfully resolve the p1639 code. Keep in mind that if you’re uncertain or uncomfortable with any aspect of the repair, it’s always best to consult a professional mechanic for guidance.

Happy troubleshooting and safe driving!

Tips For Regaining Control And Preventing Future Occurrences

Proper maintenance and regular inspections:

  • Schedule regular maintenance to ensure your vehicle is in optimal condition.
  • Follow the manufacturer’s recommended maintenance schedule, including oil changes, filter replacements, and fluid checks.
  • Conduct regular inspections of your vehicle’s components, including the engine, transmission, and electrical system, to identify any potential issues.
  • Look out for warning signs such as unusual noises, vibrations, or dashboard warning lights.

Utilizing diagnostic tools and software:

  • Invest in a reliable diagnostic tool or software to read and interpret the code. This will help identify the specific cause of the p1639 code.
  • Use the diagnostic tool or software to perform a thorough scan of your vehicle’s systems, pinpointing any underlying issues contributing to the code.
  • Follow the instructions provided by the tool or software to troubleshoot and fix the problem.

Ensuring a reliable electrical system:

  • Inspect the battery connections to ensure they are clean and tightly secured.
  • Check the alternator and starter for any signs of wear or damage.
  • Test the voltage and charging system to ensure it is operating within the manufacturer’s recommended range.
  • Replace any faulty electrical components, such as sensors or wires, that may be contributing to the p1639 code.

Following manufacturer-recommended procedures:

  • Follow the specific procedures outlined in your vehicle’s user manual or service manual for addressing the p1639 code.
  • Be thorough when performing any necessary repairs or replacements, following the manufacturer’s guidelines to ensure proper installation.

Consulting with a professional mechanic for assistance:

  • If you’re unsure about how to tackle the p1639 code or if you encounter difficulties during the repair process, it’s always wise to seek professional assistance.
  • Contact a trusted mechanic who specializes in your vehicle’s make and model to diagnose and fix the issue.
  • A qualified mechanic will have the experience and knowledge to accurately identify and resolve the problem.

By implementing these tips, you can regain control over your vehicle and prevent future occurrences of the p1639 code. Remember to prioritize proper maintenance, utilize diagnostic tools, ensure a reliable electrical system, follow manufacturer-recommended procedures, and seek professional help when needed.

Stay proactive in keeping your vehicle in excellent running condition to prevent any unexpected issues down the road.

Frequently Asked Questions Of How To Fix A P1639 Code

What Does A P1639 Code Mean In A Car?

A p1639 code in a car indicates a problem with the vehicle’s electronic throttle control system.

How Does A P1639 Code Affect My Car’S Performance?

When the p1639 code is present, your car’s performance may be affected, causing reduced power, hesitation, or stalling.

What Are The Common Causes Of A P1639 Code?

Common causes of a p1639 code include a faulty throttle body, a malfunctioning throttle position sensor, or a wiring issue.

Can I Fix A P1639 Code On My Own?

While it’s possible to fix a p1639 code on your own, it’s recommended to seek professional help to accurately diagnose and repair the issue.

How Much Does It Cost To Fix A P1639 Code?

The cost to fix a p1639 code can vary depending on the specific cause of the issue. It’s best to consult with a mechanic for an accurate estimate.


Fixing a p1639 code can be a challenging task, but with the right knowledge and approach, it is definitely achievable. By following the steps outlined in this blog post, you can effectively troubleshoot and rectify the issue causing the code.

Start by thoroughly understanding the code and the underlying problem it signifies. Then, conduct a comprehensive diagnosis of your vehicle’s electrical system to identify the exact source of the problem. Once the issue is pinpointed, proceed with the necessary repairs, whether it involves replacing faulty components, fixing wiring problems, or reprogramming the control module.

It is crucial to consistently test and verify the fixes you implement to ensure they fully resolve the code. Remember to clear the code from the vehicle’s memory, and if necessary, consider seeking professional assistance for complex cases. Take the time to educate yourself on automotive diagnostics to increase your understanding and confidence in resolving future issues that may arise.

John Thompson

Leave a Reply

Your email address will not be published. Required fields are marked *