Engine-Codes.com
Engine-Codes – Jeep – P1389 Jeep

P1389 Jeep Code - No Auto Shutdown Relay Voltage At Powertrain Control Module

Quick Answer

The P1389 Jeep code indicates that there is no voltage detected at the Powertrain Control Module (PCM) from the Auto Shutdown (ASD) relay. Common causes include Faulty ASD relay, Wiring or connection issues between the ASD relay and PCM, PCM failure. 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
P1389 Jeep indicates No Auto Shutdown Relay Voltage At Powertrain Control Module.
Common causes
Common causes include Faulty ASD relay, Wiring or connection issues between the ASD relay and PCM, PCM failure.
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 06, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P1389 Jeep Description

The P1389 Jeep code indicates that there is no voltage detected at the Powertrain Control Module (PCM) from the Auto Shutdown (ASD) relay. The ASD relay is responsible for providing power to the PCM and other essential engine components, allowing the vehicle to start and run properly. When the PCM does not receive voltage from the ASD relay, it can lead to various issues with the vehicle's performance and functionality.

OBDII Code P1389 Jeep - No Auto Shutdown Relay Voltage At Powertrain Control Module
P1389 Jeep Code - No Auto Shutdown Relay Voltage At Powertrain Control Module

Common Causes of P1389 Jeep

  1. Faulty ASD relay
  2. Wiring or connection issues between the ASD relay and PCM
  3. PCM failure
  4. Blown fuse related to the ASD relay
  5. Electrical system issues

Symptoms of P1389 Jeep

  1. Engine stalling or failure to start
  2. Rough idle or misfiring
  3. Check Engine Light illuminated
  4. Reduced fuel efficiency
  5. Limp mode activation

How to Fix P1389 Jeep

  1. Begin by checking the ASD relay for proper operation and voltage output using a multimeter. Replace the relay if it is faulty.
  2. Inspect the wiring and connections between the ASD relay and PCM for any damage, corrosion, or loose connections. Repair or replace as needed.
  3. Check the PCM for any signs of damage or failure. If necessary, replace the PCM and reprogram it to the vehicle's specifications.
  4. Verify that the fuse related to the ASD relay is intact and functioning correctly. Replace if necessary.
  5. Clear the diagnostic trouble codes from the PCM and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1389 Jeep

The typical repair costs for addressing the P1389 Jeep code can vary depending on the specific cause of the issue. Replacement of the ASD relay can cost between $50 and $150, while repairs to wiring or connections may range from $100 to $300. If the PCM needs to be replaced, costs can exceed $500, including reprogramming. Labor rates at auto repair shops typically range from $80 to $150 per hour, so the total cost may vary based on the location, vehicle make and model, and the complexity of the repair. It is recommended to consult with a qualified mechanic for an accurate estimate based on the specific circumstances.

Need more information about the P1389 Jeep code?

Need more information on how to fix the P1389 Jeep code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1389 Jeep code diagnosed by a professional: Find a repair shop in your area

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 P1389 Jeep Code

1. What are the common symptoms of OBDII code P1389 in a Jeep related to the Auto Shutdown Relay voltage issue?

- Common symptoms include engine stalling, difficulty starting the vehicle, and the engine not turning over.

2. What could be causing the OBDII code P1389 in a Jeep indicating no Auto Shutdown Relay voltage at the Powertrain Control Module?

- Possible causes may include a faulty Auto Shutdown Relay, damaged wiring or connectors, or a malfunctioning Powertrain Control Module.

3. How can I diagnose the OBDII code P1389 in my Jeep if I suspect an issue with the Auto Shutdown Relay voltage?

- You can use a multimeter to test the voltage at the Auto Shutdown Relay and the Powertrain Control Module to determine if there is a proper connection.

4. Are there any repair tips for fixing the OBDII code P1389 related to the Auto Shutdown Relay voltage problem in a Jeep?

- Ensure all wiring and connectors are secure and free of damage, replace the Auto Shutdown Relay if necessary, and consider checking the Powertrain Control Module for any faults.

5. Can a DIY enthusiast repair the OBDII code P1389 indicating no Auto Shutdown Relay voltage at the Powertrain Control Module in a Jeep?

- While some basic troubleshooting and repairs can be done by DIY enthusiasts, it is recommended to consult a professional mechanic for a thorough diagnosis and repair to ensure proper resolution.

6. Is it safe to continue driving my Jeep with the OBDII code P1389 related to the Auto Shutdown Relay voltage issue?

- It is not recommended to drive the vehicle with this issue as it may lead to engine stalling or starting problems, which can compromise safety and reliability.

7. How much does it typically cost to repair the OBDII code P1389 concerning the Auto Shutdown Relay voltage issue in a Jeep?

- Repair costs can vary depending on the exact cause of the problem, but it may range from $100 to $500 or more, including parts and labor.

8. Can extreme weather conditions affect the occurrence of the OBDII code P1389 in a Jeep due to the Auto Shutdown Relay voltage problem?

- Yes, extreme temperatures or moisture can potentially exacerbate electrical issues, leading to the symptoms associated with the code P1389.

9. Are there any preventive measures I can take to avoid encountering the OBDII code P1389 related to the Auto Shutdown Relay voltage issue in my Jeep?

- Regularly inspecting and maintaining the electrical components, such as the Auto Shutdown Relay and wiring, can help prevent issues that may trigger the code P1389.

10. How urgent is it to address the OBDII code P1389 indicating no Auto Shutdown Relay voltage at the Powertrain Control Module in a Jeep?

- It is advisable to address the issue promptly to prevent potential engine performance issues and ensure the vehicle operates safely and reliably.

Discuss the causes and fixes for P1389 Jeep OBDII Code

Submit a New Comment

  • My son got gas and the Jeep Cherokee won’t start. Pulled P1389 code. Replaced the cops sensor and still no start

    Reply to Comment

  • What sensor did you replaced?
    The P1389 indicates that there is problem with the Auto Shutdown (ASD) relay. I recommend starting by replacing the Auto Shutdown (ASD) relay.

    Reply to Comment