AutoCodes – RAM – P1389 RAM

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

Quick Answer

The Auto Shutdown (ASD) relay voltage is monitored with the engine running, battery voltage more than 10.4 volts and engine speed more than 400 RPM. Common causes include Faulty Auto Shutdown (ASD) Relay, Auto Shutdown (ASD) Relay harness is open or shorted, Auto Shutdown (ASD) Relay circuit poor electrical connection. 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 RAM indicates No Auto Shutdown Relay Voltage At Powertrain Control Module.
Common causes: Common causes include Faulty Auto Shutdown (ASD) Relay, Auto Shutdown (ASD) Relay harness is open or shorted, Auto Shutdown (ASD) Relay circuit poor electrical connection.
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.

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Code Popularity 1,114

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 26, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1389 RAM Description

The Auto Shutdown (ASD) relay voltage is monitored with the engine running, battery voltage more than 10.4 volts and engine speed more than 400 RPM. The Diagnostic Trouble Code (DTC) will set in the Powertrain Control Module (PCM) memory when PCM does not sense voltage when ASD relay is energized.

OBDII Code P1389 RAM - No Auto Shutdown Relay Voltage At Powertrain Control Module - AutoCodes.com — P1389 RAM Code - No Auto Shutdown Relay Voltage At Powertrain Control Module

What does this mean?

What are the Possible Causes of the DTC P1389 RAM?

Faulty Auto Shutdown (ASD) Relay
Auto Shutdown (ASD) Relay harness is open or shorted
Auto Shutdown (ASD) Relay circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P1389 RAM?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1389 RAM code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1389 RAM code?

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

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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 P1389 RAM Code

1. What are the common symptoms of OBDII code P1389 RAM?

- Common symptoms include engine stalling, difficulty starting the vehicle, or the vehicle not starting at all.

2. What causes the OBDII code P1389 RAM to trigger?

- The code is triggered when the Powertrain Control Module (PCM) does not detect voltage from the Auto Shutdown (ASD) relay.

3. How can I diagnose the issue causing the P1389 RAM code?

- You can start by checking the ASD relay for proper functioning, inspecting the wiring and connections for any damage, and testing the voltage at the PCM.

4. Can a faulty PCM cause the P1389 RAM code?

- Yes, a faulty PCM can potentially cause the code if it is not receiving voltage from the ASD relay.

5. What are some repair tips for addressing the P1389 RAM code?

- Repair tips include checking and replacing the ASD relay if necessary, repairing any damaged wiring or connections, and ensuring proper voltage supply to the PCM.

6. Is it safe to continue driving with the P1389 RAM code present?

- It is not recommended to continue driving with the code present as it can lead to potential engine stalling and other serious issues.

7. Can a DIY enthusiast fix the P1389 RAM code, or is professional help required?

- Depending on your level of experience and access to tools, some DIY enthusiasts may be able to address the issue by following proper diagnostic and repair procedures.

8. How much does it typically cost to repair the P1389 RAM code?

- Costs can vary depending on the underlying cause of the issue, but it is advisable to budget for potential relay or wiring replacement costs.

9. Will resetting the OBDII code P1389 RAM make it go away permanently?

- Simply resetting the code may temporarily clear it, but unless the underlying issue is addressed and resolved, the code is likely to reappear.

10. Does the OBDII code P1389 RAM affect vehicle performance?

- Yes, the code can affect vehicle performance by causing engine stalling, starting issues, and potentially leading to more severe problems if left unaddressed.