AutoCodes – Ford – P2508 Ford

P2508 Ford Code - ECM/PCM Power Input Signal High

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: P2508 Ford indicates ECM/PCM Power Input Signal High.
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 11,641

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 P2508 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 P2508 Ford - ECM/PCM Power Input Signal High - AutoCodes.com — P2508 Ford Code - ECM/PCM Power Input Signal High

What does this mean?

What are the Possible Causes of the DTC P2508 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 P2508 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 P2508 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 P2508 Ford code?

Need more information on how to fix the P2508 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2508 Ford code diagnosed by a professional: Find a repair shop in your area

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 P2508 Ford Code

1. What does the OBDII code P2508 mean on a Ford vehicle?

The P2508 code indicates that the ECM/PCM is detecting an abnormally high power input signal, which may suggest issues with voltage regulation or power supply to the module.

2. What are the common symptoms of a P2508 code in a Ford?

Symptoms may include difficulty starting the engine, intermittent stalling, poor engine performance, the Check Engine Light illuminated, or electrical system malfunctions.

3. What causes the P2508 code to appear in a Ford?

Common causes include a failing battery, loose or corroded battery connections, a malfunctioning alternator, damaged wiring to the PCM, or a faulty PCM itself.

4. Can a weak battery trigger the P2508 code in a Ford?

Yes, a weak or failing battery can cause voltage irregularities, which may lead to the P2508 code being triggered.

5. How do you diagnose a P2508 code in a Ford vehicle?

Start by inspecting the battery, alternator, and wiring for damage or corrosion. Use a multimeter to check voltage levels and confirm proper power supply to the PCM.

6. Can driving with a P2508 code damage my Ford vehicle?

It depends on the underlying issue. If the code is caused by significant electrical problems, it could lead to further damage or impair vehicle performance.

7. How do you fix the P2508 code on a Ford?

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

8. Could a blown fuse cause the P2508 code in a Ford?

Yes, a blown fuse in the PCM or power supply circuit could disrupt power and lead to the P2508 code being set.

9. How much does it cost to fix the P2508 code in a Ford?

Costs vary depending on the issue. Simple fixes like cleaning battery terminals may cost little to nothing, while replacing a PCM could cost several hundred dollars.

10. Can I clear the P2508 code without fixing the problem?

While you can clear the code with a scan tool, it will likely return if the underlying issue isn’t resolved.