AutoCodes – Ford – P2506 Ford

P2506 Ford Code - ECM/PCM Power Input Signal Range/Performance

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: P2506 Ford indicates ECM/PCM Power Input Signal Range/Performance.
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 4,756

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 P2506 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 P2506 Ford - ECM/PCM Power Input Signal Range/Performance - AutoCodes.com — P2506 Ford Code - ECM/PCM Power Input Signal Range/Performance

What does this mean?

What are the Possible Causes of the DTC P2506 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 P2506 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 P2506 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 P2506 Ford code?

Need more information on how to fix the P2506 Ford code? Get Access to Factory Service Manuals

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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 P2506 Ford Code

1. What does OBDII code P2506 mean on a Ford vehicle?

Code P2506 indicates an issue with the ECM/PCM power input signal, meaning the voltage supplied to the engine control module is outside the expected range or performing abnormally.

2. What are the common symptoms of code P2506 on a Ford?

Symptoms include engine stalling, difficulty starting the vehicle, poor fuel economy, erratic performance, and illumination of the check engine light.

3. What causes the P2506 code to appear on a Ford vehicle?

Common causes include a weak or failing battery, loose or corroded battery connections, damaged wiring, a faulty ECM/PCM, or alternator issues.

4. Can a bad alternator trigger the P2506 code on a Ford?

Yes, a failing alternator can cause inconsistent voltage delivery to the ECM, which may trigger the P2506 code.

5. How can I diagnose the P2506 code on my Ford vehicle?

Check the battery’s charge and condition, inspect all wiring and connections to the ECM/PCM, test the alternator output, and look for signs of corrosion or damage.

6. Can I drive my Ford with the P2506 code?

Driving with this code is not recommended as it can lead to stalling or further damage to the ECM/PCM and electrical components.

7. How do I fix the P2506 code on my Ford?

Repairs may include replacing the battery, cleaning or tightening battery terminals, repairing damaged wiring, or replacing a faulty alternator or ECM/PCM.

8. How much does it cost to fix the P2506 code on a Ford?

Costs vary depending on the root cause, ranging from $50 for battery terminal cleaning to $500-$1500 for ECM/PCM replacement.

9. Can a loose ground connection cause the P2506 code on my Ford?

Yes, a loose or poor ground connection can disrupt the power supply to the ECM/PCM, leading to this code.

10. Does the P2506 code always require ECM/PCM replacement?

No, the ECM/PCM is not always the issue; it’s often caused by power supply problems like battery or wiring issues. Replace the ECM/PCM only if all other causes have been ruled out.