AutoCodes – Generic – P1389

P1389 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 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 24,185

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

What does this mean?

What are the Possible Causes of the DTC P1389?

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?

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 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 code?

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

Need Help with the Code?

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Information for Specific Makes

P1389 Audi — Engine Control Module 2 Defective
P1389 Chrysler — No Auto Shutdown Relay Voltage At Powertrain Control Module
P1389 Dodge — No Auto Shutdown Relay Voltage At Powertrain Control Module
P1389 Ford — Glow Plug Circuit High Side Low Input
P1389 Jeep — No Auto Shutdown Relay Voltage At Powertrain Control Module
P1389 RAM — No Auto Shutdown Relay Voltage At Powertrain Control Module
P1389 Volkswagen — Engine Control Module 2 Defective

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.