What are the common causes of P2507?

A weak or dead battery. An alternator that does not charge. An open in the ECM/PCM power feed. Corrosion on the battery terminals or wiring.

Read ECM/PCM power input voltage on a scan tool. Check the battery and charging system under load. Test the ECM/PCM power feed for an open. Inspect the battery terminals and wiring for corrosion. Repair the power feed if the battery and charging system test good. Clear the code and retest.

P2507

ECM/PCM Power Input Signal Low

System: Speed and idle control (P code)
Lamp: Check Engine Light
Category: Powertrain - Computer and Auxiliary Controls

What it means

P2507 means ECM/PCM Power Input Signal Low.

Check these first

A weak or dead battery
An alternator that does not charge
An open in the ECM/PCM power feed
Corrosion on the battery terminals or wiring

What to do next

Read ECM/PCM power input voltage on a scan tool
Check the battery and charging system under load
Test the ECM/PCM power feed for an open
Inspect the battery terminals and wiring for corrosion
Repair the power feed if the battery and charging system test good
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.