AutoCodes – Ford – P2509 Ford

P2509 Ford Code - ECM/PCM Power Input Signal Intermittent

Quick Answer

When the ignition switch is turned "ON", the battery voltage is applied from the battery to the Powertrain Control Module (PCM)/Engine Control Module (ECM) through the main relay. Common causes include Low battery voltage, Faulty Powertrain Control Module (PCM)/Engine Control Module (ECM), ECM/PCM 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: P2509 Ford indicates ECM/PCM Power Input Signal Intermittent.
Common causes: Common causes include Low battery voltage, Faulty Powertrain Control Module (PCM)/Engine Control Module (ECM), ECM/PCM 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 2,185

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 Jan 16, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2509 Ford Description

When the ignition switch is turned "ON", the battery voltage is applied from the battery to the Powertrain Control Module (PCM)/Engine Control Module (ECM) through the main relay. In case that the ignition switch is turned "OFF", the ECM/PCM is supplied with power through the battery power input line to control the basic operation of the vehicle. The ECM/PCM set the OBDII code when the ECM/PCM Power Input is out of factory specifications.

OBDII Code P2509 Ford - ECM/PCM Power Input Signal Intermittent - AutoCodes.com — P2509 Ford Code - ECM/PCM Power Input Signal Intermittent

What does this mean?

What are the Possible Causes of the DTC P2509 Ford?

Low battery voltage
Faulty Powertrain Control Module (PCM)/Engine Control Module (ECM)
ECM/PCM harness is open or shorted
ECM/PCM circuit poor electrical connection

How to Fix the DTC P2509 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 P2509 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 P2509 Ford code?

Need more information on how to fix the P2509 Ford 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 P2509 Ford Code

1. What are the common symptoms of OBDII code P2509 in a Ford vehicle?

The common symptoms of OBDII code P2509 in a Ford vehicle include intermittent starting issues, engine stalling, and potential loss of power.

2. What does OBDII code P2509 in a Ford indicate?

OBDII code P2509 in a Ford indicates an intermittent power input signal to the Engine Control Module (ECM) or Powertrain Control Module (PCM).

3. What are the possible causes of OBDII code P2509 in a Ford?

Possible causes of OBDII code P2509 in a Ford include a faulty ECM/PCM power relay, loose or corroded wiring connections, or a failing ECM/PCM.

4. How can I diagnose the cause of OBDII code P2509 in my Ford vehicle?

Diagnosing the cause of OBDII code P2509 in a Ford typically involves checking the ECM/PCM power relay, inspecting wiring connections for damage or corrosion, and testing the ECM/PCM for proper function.

5. Can I continue driving my Ford vehicle with OBDII code P2509?

It is not recommended to continue driving your Ford vehicle with OBDII code P2509, as it can lead to potential engine performance issues or stalling.

6. How can I repair OBDII code P2509 in my Ford vehicle?

Repairing OBDII code P2509 in a Ford vehicle may involve replacing the ECM/PCM power relay, repairing or replacing damaged wiring connections, or replacing the ECM/PCM itself.

7. Are there any DIY tips for fixing OBDII code P2509 in a Ford?

While diagnosing and repairing OBDII code P2509 may require specialized tools and expertise, checking and cleaning wiring connections and ensuring proper relay function are DIY steps that can help resolve the issue.

8. Is it necessary to reset the OBDII code P2509 after repairing the issue in a Ford vehicle?

Yes, it is important to clear the OBDII code P2509 from the vehicle's ECM/PCM memory after repairing the underlying issue to ensure proper functioning and accurate diagnostics in the future.

9. Can a faulty battery or alternator cause OBDII code P2509 in a Ford vehicle?

While a faulty battery or alternator can contribute to electrical issues in a vehicle, OBDII code P2509 in a Ford is specifically related to the ECM/PCM power input signal and is more likely caused by a relay or wiring issue.

10. How much does it cost to repair OBDII code P2509 in a Ford vehicle?

The cost to repair OBDII code P2509 in a Ford vehicle can vary depending on the specific cause of the issue, but it may range from a few hundred to a thousand dollars, including parts and labor.