AutoCodes – Ford – P0622 2010 Ford Fusion

P0622 2010 Ford Fusion Code - Generator Field Terminal 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: P0622 2010 Ford Fusion indicates Generator Field Terminal 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 1,857

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 01, 2019

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0622 2010 Ford Fusion 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 P0622 2010 Ford Fusion - Generator Field Terminal Circuit - AutoCodes.com — P0622 2010 Ford Fusion Code - Generator Field Terminal Circuit

What does this mean?

What are the Possible Causes of the DTC P0622 2010 Ford Fusion?

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 P0622 2010 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 does this mean?

Code Tech Notes

If the battery is OK then the alternator is more than likely the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0622 2010 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.

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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 P0622 2010 Ford Fusion Code

1. What does the OBDII code P0622 mean in a 2010 Ford Fusion?

P0622 indicates a problem in the generator field terminal circuit, which is responsible for controlling the alternator's output.

2. What are the common symptoms of code P0622 in a 2010 Ford Fusion?

Symptoms include a dead battery, charging system warning light, dim headlights, or difficulty starting the vehicle.

3. What causes code P0622 in a 2010 Ford Fusion?

Common causes include a faulty alternator, damaged wiring or connections in the generator field circuit, or a failed PCM (Powertrain Control Module).

4. Can a bad alternator trigger the P0622 code in a 2010 Ford Fusion?

Yes, a malfunctioning alternator can cause the generator field terminal circuit to fail, triggering the P0622 code.

5. How do I fix code P0622 on a 2010 Ford Fusion?

Repairs may include replacing the alternator, fixing damaged wiring, or checking and replacing the PCM if necessary.

6. Can I drive my 2010 Ford Fusion with code P0622?

Driving with this code is not recommended as it can lead to battery failure and the vehicle stalling due to insufficient electrical power.

7. How is code P0622 diagnosed on a 2010 Ford Fusion?

Diagnosis typically involves checking the alternator, inspecting the wiring and connectors in the generator field circuit, and testing the PCM.

8. What tools are needed to fix code P0622 in a 2010 Ford Fusion?

Tools may include a multimeter for testing electrical connections, a scan tool for reading and clearing codes, and basic hand tools for alternator removal.

9. Can a faulty PCM cause code P0622 on a 2010 Ford Fusion?

Yes, if the PCM fails to properly control the generator field circuit, it can trigger the P0622 code.

10. How much does it cost to repair code P0622 on a 2010 Ford Fusion?

Repair costs vary depending on the issue, but alternator replacement typically ranges from $300 to $600, while wiring repairs or PCM replacement may cost more.