AutoCodes – Ford – P1397 2008 Ford Fusion

P1397 2008 Ford Fusion Code - System Voltage Out Of Self Test Range

Quick Answer

The P1397 code indicates that the 12-volt system voltage is too high or too low during the Key On Engine Off (KOEO) or key on engine running (KOER) self-test. Common causes include Alternator belt loose or missing, Low battery voltage, Faulty Charging System. 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: P1397 2008 Ford Fusion indicates System Voltage Out Of Self Test Range.
Common causes: Common causes include Alternator belt loose or missing, Low battery voltage, Faulty Charging System.
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 2,063

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 18, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1397 2008 Ford Fusion Description

The P1397 code indicates that the 12-volt system voltage is too high or too low during the Key On Engine Off (KOEO) or key on engine running (KOER) self-test. It sets if the system voltage falls below or exceeds the calibrated threshold at any time during the KOEO or KOER self-test.

OBDII Code P1397 2008 Ford Fusion - System Voltage Out Of Self Test Range - AutoCodes.com — P1397 2008 Ford Fusion Code - System Voltage Out Of Self Test Range

What does this mean?

What are the Possible Causes of the DTC P1397 2008 Ford Fusion?

Alternator belt loose or missing
Low battery voltage
Faulty Charging System

How to Fix the DTC P1397 2008 Ford Fusion?

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 P1397 2008 Ford Fusion 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 P1397 2008 Ford Fusion code?

Need more information on how to fix the P1397 2008 Ford Fusion code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P1397 2008 Ford Fusion Code

What are the common symptoms of OBDII code P1397 on a 2008 Ford Fusion?

The common symptoms of OBDII code P1397 on a 2008 Ford Fusion include rough idling, engine misfires, stalling, and a decrease in overall engine performance.

What are the possible causes of OBDII code P1397 on a 2008 Ford Fusion?

Possible causes of OBDII code P1397 on a 2008 Ford Fusion include a faulty alternator, issues with the battery, a malfunctioning voltage regulator, or problems with the wiring or connectors in the charging system.

How can I diagnose OBDII code P1397 on a 2008 Ford Fusion?

To diagnose OBDII code P1397 on a 2008 Ford Fusion, you can start by checking the battery voltage, inspecting the alternator and voltage regulator, and examining the wiring and connectors in the charging system for any signs of damage or wear.

What are some repair tips for fixing OBDII code P1397 on a 2008 Ford Fusion?

Repair tips for fixing OBDII code P1397 on a 2008 Ford Fusion include replacing a faulty alternator or voltage regulator, ensuring the battery is in good condition, and repairing any damaged wiring or connectors in the charging system.

Can driving with OBDII code P1397 on a 2008 Ford Fusion cause further damage?

Driving with OBDII code P1397 on a 2008 Ford Fusion can potentially cause further damage to the electrical components of the vehicle, such as the alternator, battery, and voltage regulator. It is recommended to address the issue promptly to avoid additional problems.

How serious is OBDII code P1397 on a 2008 Ford Fusion?

OBDII code P1397 on a 2008 Ford Fusion is a serious issue as it indicates a problem with the vehicle's charging system, which can lead to engine performance issues, stalling, or even complete failure to start. It is important to address this code promptly.

Can I reset OBDII code P1397 on a 2008 Ford Fusion by disconnecting the battery?

While disconnecting the battery may temporarily clear OBDII code P1397 on a 2008 Ford Fusion, it will not fix the underlying issue causing the code. It is recommended to diagnose and repair the root cause of the problem to prevent the code from reoccurring.

Is it safe to continue driving my 2008 Ford Fusion with OBDII code P1397?

It is not recommended to continue driving your 2008 Ford Fusion with OBDII code P1397, as the issue is related to the vehicle's charging system. Ignoring the problem can lead to further damage and potential safety risks. It is best to address the code as soon as possible.