AutoCodes – Saturn – P0689 Saturn

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

Quick Answer

The powertrain relay is a normally open relay. Common causes include Weak battery, Low voltage while cranking, Faulty Engine Control Module (ECM) power 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 Saturn 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) power 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 1,827

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 Jul 18, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0689 Saturn Description

The powertrain relay is a normally open relay. The relay armature is held in the open position by spring tension. Battery positive voltage is supplied directly to the relay coil and the armature contact at all times. The Engine Control Module (ECM) supplies the ground path to the relay coil control circuit via an internal integrated circuit called an Output Driver Module (ODM). The ODM output control is configured to operate as a low side driver for the powertrain relay. The ODM for the powertrain relay also incorporates a fault detection circuit, which is continuously monitored by the ECM. When the ECM commands the powertrain relay ON, ignition 1 voltage is supplied to the ECM, and to several additional circuits.

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

What does this mean?

What are the Possible Causes of the DTC P0689 Saturn?

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

How to Fix the DTC P0689 Saturn?

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 P0689 Saturn 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 Saturn code?

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

Need Help with the Code?

Get the P0689 Saturn 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 Saturn Code

1. What are the common symptoms of OBDII code P0689 on a Saturn?

The common symptoms of code P0689 on a Saturn can include engine stalling, difficulty starting the vehicle, and illumination of the check engine light.

2. What does the OBDII code P0689 on a Saturn indicate?

Code P0689 indicates a problem with the Electronic Control Module Power Relay Sense Circuit being low, which can affect the power supply to the engine control module.

3. What are the possible causes of OBDII code P0689 on a Saturn?

Possible causes of code P0689 on a Saturn include a faulty power relay, damaged wiring in the power relay circuit, or a malfunctioning engine control module.

4. How can I diagnose the Electronic Control Module Power Relay Sense Circuit low on my Saturn?

Diagnosing code P0689 on a Saturn involves using a scan tool to check for the specific fault code, inspecting the power relay and associated wiring, and testing the engine control module for proper function.

5. Can I drive my Saturn with OBDII code P0689?

It is not recommended to drive your Saturn with code P0689 present, as it can lead to potential engine performance issues and further damage if left unaddressed.

6. How do I repair OBDII code P0689 on my Saturn?

Repairing code P0689 on a Saturn may involve replacing the faulty power relay, repairing damaged wiring, or replacing the engine control module if necessary.

7. Is it possible to reset the OBDII code P0689 on a Saturn without fixing the issue?

While you can clear the fault code with a scan tool, it is not advisable to reset the code without addressing the underlying issue, as it may result in recurring problems.

8. Can a DIY enthusiast fix OBDII code P0689 on a Saturn?

Depending on your skill level and access to tools, you may be able to diagnose and repair code P0689 on your Saturn. However, complex electrical issues may require professional assistance.

9. How much does it cost to fix OBDII code P0689 on a Saturn?

The cost of fixing code P0689 on a Saturn can vary depending on the specific cause of the issue, parts needed for repair, and labor costs. It is best to consult a mechanic for an accurate estimate.

10. How can I prevent OBDII code P0689 from appearing on my Saturn in the future?

To prevent code P0689 from reoccurring on your Saturn, it is essential to perform regular vehicle maintenance, address any electrical issues promptly, and ensure all components are in good working condition.