AutoCodes – Ford – P0689 Ford

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

Quick Answer

The Powertrain Control Module (PCM) monitors the voltage on the Ignition Switch Position Run (ISP-R) and the Fuel Injector Power Monitor (INJPWRM) circuits. Common causes include Weak battery, Low voltage while cranking, Faulty Powertrain Control Module (PCM) 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 Ford indicates Electronic Control Module Power Relay Sense Circuit Low.
Common causes: Common causes include Weak battery, Low voltage while cranking, Faulty Powertrain Control Module (PCM) 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 18,369

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
Cost to Diagnose
Comments
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Code P0689 Ford Description

The Powertrain Control Module (PCM) monitors the voltage on the Ignition Switch Position Run (ISP-R) and the Fuel Injector Power Monitor (INJPWRM) circuits. This DTC sets when the voltage on the ISP-R and the INJPWRM circuit voltages do not correspond for a calibrated period of time.

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

What does this mean?

What are the Possible Causes of the DTC P0689 Ford?

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

How to Fix the DTC P0689 Ford?

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 Ford 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 Ford code?

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Information for Specific Ford Models

P0689 2006 Ford Fusion — Electronic Control Module Power Relay Sense Circuit Low
P0689 2007 Ford Fusion — Electronic Control Module Power Relay Sense Circuit Low
P0689 2008 Ford Fusion — Electronic Control Module Power Relay Sense Circuit Low
P0689 2009 Ford Fusion — Electronic Control Module Power Relay Sense Circuit Low
P0689 2010 Ford Fusion — Electronic Control Module Power Relay Sense Circuit Low
P0689 2011 Ford Fusion — Electronic Control Module Power Relay Sense Circuit Low
P0689 2012 Ford Fusion — Electronic Control Module Power Relay Sense Circuit Low

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.