AutoCodes – Ford – P0620 Ford

P0620 Ford Code - Generator Control Circuit

Quick Answer

The Engine Control Module (ECM) uses the generator turn on signal circuit to control the generator. Common causes include Battery charge, Faulty Generator, Generator harness is open or shorted. 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: P0620 Ford indicates Generator Control Circuit.
Common causes: Common causes include Battery charge, Faulty Generator, Generator harness is open or shorted.
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 52,193

How popular is this code, among other codes? Medium

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 01, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0620 Ford Description

The Engine Control Module (ECM) uses the generator turn on signal circuit to control the generator. A high side driver within the ECM allows the ECM to turn the generator ON and OFF. When Generator operation is desired, the ECM sends a 5 volt signal to the voltage regulator via the generator turn on signal circuit. This causes the voltage regulator to begin controlling the generator field circuit. Once the Generator is enabled by the ECM, the voltage regulator controls generator output independently of the ECM. Under certain operating conditions, the ECM can turn Off the generator by turning Off the 5 volt signal on the generator turn on signal circuit.

OBDII Code P0620 Ford - Generator Control Circuit - AutoCodes.com — P0620 Ford Code - Generator Control Circuit

What does this mean?

What are the Possible Causes of the DTC P0620 Ford?

Battery charge
Faulty Generator
Generator harness is open or shorted
Generator circuit poor electrical connection
Engine Control Module (ECM) controlled generator
Faulty ECM

How to Fix the DTC P0620 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 P0620 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 P0620 Ford code?

Need more information on how to fix the P0620 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0620 Ford code diagnosed by a professional: Find a repair shop in your area

Information for Specific Ford Models

P0620 2006 Ford Fusion — Generator Control Circuit
P0620 2007 Ford Fusion — Generator Control Circuit
P0620 2008 Ford Fusion — Generator Control Circuit
P0620 2009 Ford Fusion — Generator Control Circuit
P0620 2010 Ford Fusion — Generator Control Circuit
P0620 2011 Ford Fusion — Generator Control Circuit
P0620 2012 Ford Fusion — Generator Control Circuit

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 P0620 Ford Code

1. What is OBDII code P0620 in a Ford vehicle?

OBDII code P0620 in a Ford vehicle refers to an issue with the Generator Control Circuit.

2. What are the common symptoms of OBDII code P0620 in a Ford vehicle?

Common symptoms of OBDII code P0620 in a Ford vehicle include illuminated check engine light, charging system failure, and battery-related problems.

3. What are the possible causes of OBDII code P0620 in a Ford vehicle?

Possible causes of OBDII code P0620 in a Ford vehicle include a faulty generator (alternator), damaged wiring or connectors in the generator control circuit, or a defective generator control module.

4. How can I diagnose OBDII code P0620 in a Ford vehicle?

Diagnosing OBDII code P0620 in a Ford vehicle involves using an OBDII scanner to retrieve the code, inspecting the generator control circuit wiring and connections, testing the generator and control module, and checking the battery and charging system components.

5. How can I repair OBDII code P0620 in a Ford vehicle?

Repairing OBDII code P0620 in a Ford vehicle may involve replacing a faulty generator, repairing damaged wiring or connectors, replacing the generator control module, or addressing any other underlying issues causing the code.

6. Can driving with OBDII code P0620 in a Ford vehicle cause further damage?

Continuing to drive with OBDII code P0620 in a Ford vehicle can potentially lead to further damage to the electrical system, including the generator, battery, and other components.

7. How much does it typically cost to repair OBDII code P0620 in a Ford vehicle?

The cost to repair OBDII code P0620 in a Ford vehicle can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Is it safe to reset the OBDII code P0620 in a Ford vehicle and continue driving?

Resetting the OBDII code P0620 in a Ford vehicle may temporarily turn off the check engine light, but it is not recommended to ignore the underlying issue as it could lead to further problems with the vehicle's electrical system.

9. Can a DIY enthusiast repair OBDII code P0620 in a Ford vehicle?

Depending on their skill level and access to tools, a DIY enthusiast may be able to diagnose and repair OBDII code P0620 in a Ford vehicle, particularly if the issue is related to wiring or connectors. However, more complex repairs may require professional assistance.

10. How long does it typically take to repair OBDII code P0620 in a Ford vehicle?

The time required to repair OBDII code P0620 in a Ford vehicle can vary based on the specific cause of the issue and the complexity of the repair. It may take a few hours to a full day for a mechanic to diagnose and fix the problem.