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P1637 Mitsubishi Code - Malfunction of Memory Backup

Quick Answer

The diagnostic trouble code (DTC) P1637 for Mitsubishi vehicles indicates a malfunction in the memory backup circuit. Common causes include Faulty memory backup battery or capacitor, Wiring issues in the memory backup circuit, Corrosion or poor connections in the memory backup system. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1637 Mitsubishi indicates Malfunction of Memory Backup.
Common causes
Common causes include Faulty memory backup battery or capacitor, Wiring issues in the memory backup circuit, Corrosion or poor connections in the memory backup system.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P1637 Mitsubishi Description

The diagnostic trouble code (DTC) P1637 for Mitsubishi vehicles indicates a malfunction in the memory backup circuit. In modern vehicles, the memory backup system is responsible for storing essential data and settings when the vehicle is turned off, such as radio presets, seat positions, and climate control settings. This data is stored in non-volatile memory, typically powered by a small battery or capacitor. When a malfunction occurs in this system, it can lead to the loss of stored data and settings, causing inconvenience to the vehicle owner.

OBDII Code P1637 Mitsubishi - Malfunction of Memory Backup
P1637 Mitsubishi Code - Malfunction of Memory Backup

Common Causes of P1637 Mitsubishi

  1. Faulty memory backup battery or capacitor
  2. Wiring issues in the memory backup circuit
  3. Corrosion or poor connections in the memory backup system
  4. Electronic control module (ECM) malfunction affecting memory backup
  5. Software glitches in the vehicle's computer systems

Symptoms of P1637 Mitsubishi

  1. Loss of radio presets and other stored settings
  2. Erratic behavior of electronic systems (e.g., climate control, seat positions)
  3. Warning lights on the dashboard related to memory backup
  4. Difficulty starting the vehicle due to loss of stored data

How to Fix P1637 Mitsubishi

  1. Diagnose the specific cause of the memory backup malfunction using a diagnostic scanner.
  2. Inspect the memory backup battery or capacitor for proper operation and replace if necessary.
  3. Check the wiring and connections in the memory backup circuit for any damage or corrosion and repair as needed.
  4. Reset and reprogram the vehicle's computer systems to ensure proper function of the memory backup system.
  5. Test the vehicle to verify that the memory backup system is functioning correctly and all stored data is retained.

Cost to Fix P1637 Mitsubishi

The cost of repairing a malfunction in the memory backup system can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. Typically, the cost of parts for this repair can range from $50 to $200, while labor costs can range from $100 to $300. Overall, the total repair cost for addressing a P1637 code in a Mitsubishi vehicle could range from $150 to $500. It is advisable to consult with a qualified mechanic or auto repair shop to obtain a more accurate estimate based on the specific circumstances of the vehicle.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1637 Mitsubishi Code

1. What are the common symptoms of OBDII code P1637 in a Mitsubishi related to the malfunction of memory backup?

The common symptoms include difficulty starting the vehicle, loss of radio presets, clock reset, and issues with power windows and other electronic components.

2. What are the possible causes of the P1637 code indicating a malfunction of memory backup in a Mitsubishi?

The code may be triggered by a faulty memory backup power supply, a malfunctioning memory backup circuit, or a problem with the body control module.

3. How can I diagnose the cause of the P1637 code in my Mitsubishi related to memory backup malfunction?

You can start by checking the memory backup fuse, inspecting the wiring and connectors in the memory backup circuit, and testing the battery voltage to the memory backup power supply.

4. Are there any simple repair tips for addressing the P1637 code in a Mitsubishi due to memory backup issues?

You can try resetting the memory by disconnecting the battery for a few minutes and reconnecting it. Ensure the battery is in good condition and properly connected to address potential memory backup problems.

5. Can the P1637 code related to memory backup malfunction in a Mitsubishi be fixed without professional help?

In some cases, simple troubleshooting steps like checking fuses and connections may resolve the issue. However, if the problem persists, it is recommended to seek help from a qualified mechanic for a thorough diagnosis and repair.

6. Is it safe to continue driving my Mitsubishi with the P1637 code indicating memory backup malfunction?

While the vehicle may still be operable with this code, ignoring the issue can lead to further electrical problems and inconvenience. It is advisable to address the underlying cause promptly to prevent any potential complications.

7. How much does it typically cost to repair the P1637 code in a Mitsubishi related to memory backup malfunction?

The cost of repair can vary depending on the cause of the issue. Simple fixes like replacing a fuse may be inexpensive, while repairing or replacing components in the memory backup circuit can be more costly. It is best to get a professional assessment for an accurate estimate.

8. Can a DIY enthusiast with basic automotive knowledge fix the P1637 code indicating memory backup malfunction in a Mitsubishi?

While some basic troubleshooting steps can be attempted by DIY enthusiasts, diagnosing and repairing complex electrical issues like this code may require specialized tools and expertise. It is recommended to consult a professional if unsure.

9. Will resetting the OBDII code P1637 related to memory backup malfunction make it go away permanently?

Simply clearing the code may temporarily eliminate the warning, but if the underlying issue causing the memory backup malfunction is not addressed, the code is likely to reappear. It is crucial to identify and resolve the root cause for a permanent fix.

10. How long does it take to repair the OBDII code P1637 in a Mitsubishi caused by memory backup malfunction?

The repair time can vary based on the specific cause of the issue. Simple fixes may take a short time, while more complex repairs could require additional diagnostic work and parts replacement, extending the repair duration.

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