What Does P2509 Code Mean?
OBD-II Code P2509 is defined as a ECM/PCM Power Input Signal Intermittent
The engine computer (PCM) relies on a constant power supply from the Battery. If the PCM does not have sufficient power supply, code P2509 will be set.
P2509 Symptoms
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Engine may not start
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Engine may stall
Common Problems That Trigger the P2509 Code
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Powertrain Control Module (PCM) failure
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Powertrain Control Module (PCM) power relay failure
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Wiring issue