AutoCodes – Mitsubishi – P0689 Mitsubishi

P0689 Mitsubishi Code - Electronic Control Module Power Relay Sense Circuit Low

Quick Answer

The Engine Control Module (ECM) monitors the power inputs. Common causes include Weak battery, Low voltage while cranking, Faulty Engine Control Module (ECM) relay. 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: P0689 Mitsubishi indicates Electronic Control Module Power Relay Sense Circuit Low.
Common causes: Common causes include Weak battery, Low voltage while cranking, Faulty Engine Control Module (ECM) relay.
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 2,918

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 May 05, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0689 Mitsubishi Description

The Engine Control Module (ECM) monitors the power inputs. The ECM sets the OBDII code when the ECM remains powered up after the ignition switch has been turned OFF.

OBDII Code P0689 Mitsubishi - Electronic Control Module Power Relay Sense Circuit Low - AutoCodes.com — P0689 Mitsubishi Code - Electronic Control Module Power Relay Sense Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0689 Mitsubishi?

Weak battery
Low voltage while cranking
Faulty Engine Control Module (ECM) relay
Blown ECM fuse
Faulty ECM
ECM harness is open or shorted
ECM circuit poor electrical connection

How to Fix the DTC P0689 Mitsubishi?

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 does this mean?

Code Tech Notes

Check all the ECM fuses, if the fuses are OK try replacing the ASD relay.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0689 Mitsubishi 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 P0689 Mitsubishi code?

Need more information on how to fix the P0689 Mitsubishi code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0689 Mitsubishi 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 P0689 Mitsubishi Code

1. What are the common symptoms of OBDII code P0689 in a Mitsubishi related to the Electronic Control Module Power Relay Sense Circuit Low?

The common symptoms include engine stalling, difficulty starting the vehicle, and illuminated Check Engine Light.

2. What are the potential causes of the OBDII code P0689 in a Mitsubishi?

Potential causes of this code include a faulty electronic control module power relay, damaged wiring or connectors in the power relay circuit, or a malfunctioning engine control module (ECM).

3. How can I diagnose the Electronic Control Module Power Relay Sense Circuit Low issue in my Mitsubishi?

Diagnosis involves using a multimeter to test the power relay, inspecting the wiring and connectors for any damage, and checking the ECM for proper functioning. It is recommended to consult a professional mechanic for accurate diagnosis.

4. Can I still drive my Mitsubishi with the OBDII code P0689 present?

It is not recommended to drive your Mitsubishi with this code present, as it can lead to engine performance issues and potential stalling. It is best to address the issue promptly to avoid further damage.

5. How can I repair the Electronic Control Module Power Relay Sense Circuit Low problem in my Mitsubishi?

Repairing this issue may involve replacing the faulty power relay, repairing damaged wiring or connectors, or reprogramming the ECM. It is advised to seek assistance from a qualified technician for proper repair.

6. What are some DIY tips for troubleshooting the OBDII code P0689 in a Mitsubishi?

You can start by checking the power relay fuse, inspecting the wiring for any visible damage, and ensuring all connectors are securely attached. If you are comfortable with electrical work, you may attempt to test the power relay using a multimeter.

7. Will resetting the Check Engine Light resolve the OBDII code P0689 in my Mitsubishi?

Resetting the Check Engine Light may temporarily clear the code, but it will not fix the underlying issue causing the code. It is essential to diagnose and address the root cause of the problem to prevent it from reoccurring.

8. How much does it typically cost to repair the Electronic Control Module Power Relay Sense Circuit Low in a Mitsubishi?

The cost of repair can vary depending on the extent of the damage and the specific components that need to be replaced. It is advisable to obtain quotes from different repair shops to compare prices.

9. Can a low battery voltage trigger the OBDII code P0689 in a Mitsubishi?

Low battery voltage can potentially cause issues with the power relay circuit and trigger this code. It is essential to ensure the battery is in good condition and properly charged to prevent such issues.

10. Is the OBDII code P0689 specific to Mitsubishi vehicles only?

While this specific code may be more common in Mitsubishi vehicles, it can also occur in other car makes and models. The diagnostic process and repair steps may vary depending on the vehicle manufacturer.