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P1684 Jeep Code - Battery Power To Module Disconnected

Quick Answer

The P1684 code for Jeep vehicles indicates that the battery power to a specific module has been disconnected. Common causes include Loose or corroded battery connections, Faulty PCM, Damaged wiring harness. 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
P1684 Jeep indicates Battery Power To Module Disconnected.
Common causes
Common causes include Loose or corroded battery connections, Faulty PCM, Damaged wiring harness.
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 10, 2024
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Code P1684 Jeep Description

The P1684 code for Jeep vehicles indicates that the battery power to a specific module has been disconnected. This module is typically the Powertrain Control Module (PCM), which is a vital component responsible for managing various engine and transmission functions. When the battery power to the PCM is disconnected, it can lead to a loss of important data and settings, potentially affecting the vehicle's performance and drivability.

OBDII Code P1684 Jeep - Battery Power To Module Disconnected
P1684 Jeep Code - Battery Power To Module Disconnected

Common Causes of P1684 Jeep

  1. Loose or corroded battery connections
  2. Faulty PCM
  3. Damaged wiring harness
  4. Blown fuse
  5. Electrical system issues

Symptoms of P1684 Jeep

  1. Engine running poorly or inefficiently
  2. Rough idling or stalling
  3. Hesitation during acceleration
  4. Check Engine Light illuminated
  5. Failed emissions test

How to Fix P1684 Jeep

  1. Check and tighten battery connections to ensure a secure and proper connection.
  2. Inspect the wiring harness for any damage or corrosion, repairing or replacing as needed.
  3. Test the PCM for functionality and replace if necessary.
  4. Check and replace any blown fuses related to the PCM.
  5. Clear the diagnostic trouble codes and reset the PCM to ensure proper operation.

Cost to Fix P1684 Jeep

The typical repair costs for addressing a P1684 code can vary depending on the specific cause of the issue. In general, the cost of parts for this repair can range from $50 to $300, with labor costs adding an additional $80 to $150 per hour. Overall, the total repair bill may amount to anywhere from $150 to $500 or more, depending on the extent of the repairs needed. It's advisable to consult with a trusted auto repair shop to obtain a more accurate estimate based on the specific circumstances of your vehicle.

What does this mean?

Tech Notes for P1684 Jeep

If other codes are present, check and repair other codes first. Make sure the battery charge is OK and the battery connectors are firmly secure.

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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 P1684 Jeep Code

1. What are the common symptoms of OBDII code P1684 in a Jeep?

- Common symptoms include the engine stalling, difficulty starting the vehicle, and issues with power accessories.

2. What does the OBDII code P1684 in a Jeep indicate?

- The code P1684 indicates that battery power to a module has been disconnected.

3. What are the possible causes of OBDII code P1684 in a Jeep?

- Possible causes include a loose or corroded battery terminal connection, a faulty battery, a damaged battery cable, or a problem with the power distribution center.

4. How can I diagnose the OBDII code P1684 in my Jeep?

- You can start by checking the battery terminals for tightness and corrosion, inspecting the battery cables for damage, and testing the battery's voltage and condition.

5. Can I drive my Jeep with the OBDII code P1684 present?

- It is not recommended to drive your Jeep with the code P1684 present, as it can lead to further electrical issues and potential stalling of the engine.

6. How can I repair OBDII code P1684 in my Jeep?

- To repair the code, you may need to tighten or clean the battery terminals, replace a faulty battery, repair damaged battery cables, or address any issues with the power distribution center.

7. Will resetting the OBDII code P1684 make it go away permanently?

- Resetting the code may temporarily clear it, but if the underlying issue, such as a loose battery connection, is not addressed, the code is likely to reappear.

8. Is it safe to clear the OBDII code P1684 with a code reader?

- It is safe to clear the code with a code reader, but it is important to address the root cause of the issue to prevent further problems.

9. Can a faulty alternator cause the OBDII code P1684 to appear in a Jeep?

- While a faulty alternator can cause electrical issues, the OBDII code P1684 specifically relates to battery power to a module being disconnected.

10. How can I prevent OBDII code P1684 from reoccurring in my Jeep?

- Regularly inspecting and maintaining the battery terminals, cables, and overall electrical system can help prevent the recurrence of the code P1684 in your Jeep.

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