AutoCodes – Dodge – P2509 Dodge

P2509 Dodge 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 Dodge 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 53,015

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 Jun 29, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P2509 Dodge 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 Dodge - ECM/PCM Power Input Signal Intermittent - AutoCodes.com — P2509 Dodge Code - ECM/PCM Power Input Signal Intermittent

What does this mean?

What are the Possible Causes of the DTC P2509 Dodge?

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 Dodge?

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

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2509 Dodge 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 P2509 Dodge Code

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

- Common symptoms include intermittent stalling, rough idling, loss of power, and difficulty starting the engine.

2. What can cause the OBDII code P2509 ECM/PCM Power Input Signal Intermittent in a Dodge?

- Possible causes include a faulty ECM/PCM power input signal circuit, poor electrical connections, a weak battery, or a failing alternator.

3. How can I diagnose the cause of the P2509 code in my Dodge?

- Diagnose by checking the battery voltage, inspecting the power input signal circuit for damage, testing the alternator output, and verifying the connections to the ECM/PCM.

4. Is it safe to continue driving with the OBDII code P2509 in my Dodge?

- It is not recommended to drive with the P2509 code present, as it can lead to further damage to the vehicle and potential safety hazards.

5. Can I repair the P2509 code issue in my Dodge myself?

- Depending on your mechanical skills, you may be able to repair the issue yourself by checking and repairing any damaged wiring, ensuring proper battery and alternator function, and clearing the code.

6. How much does it typically cost to repair the OBDII code P2509 in a Dodge at a mechanic?

- The cost of repair can vary depending on the exact cause of the P2509 code, but it may range from $100 to $300 for parts and labor.

7. Will resetting the OBDII code P2509 in my Dodge make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear.

8. Can a weak battery cause the OBDII code P2509 to trigger in a Dodge?

- Yes, a weak or failing battery can cause voltage fluctuations, leading to the intermittent power input signal that triggers the P2509 code.

9. How urgent is it to address the OBDII code P2509 in my Dodge?

- It is recommended to address the P2509 code as soon as possible to prevent potential damage to other components and ensure the safe operation of your vehicle.

10. Will the OBDII code P2509 affect the emissions performance of my Dodge vehicle?

- Yes, unresolved issues related to the P2509 code can impact the emissions performance of your vehicle, potentially leading to a failed emissions test.