Code result
P2507
ECM/PCM Power Input Signal Low
Moderate severity
What it means
The ECM/PCM switched-battery input reads below threshold while the ignition is on. Either the main relay does not close, the supply wire is broken or shorted to ground, or the battery is too low. Engine usually fails to start until the input recovers.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Main relay does not pull in
highOne of the most commonly reported causes for this code — check this first.
Open supply wire
mediumA plausible cause — test and verify before replacing parts.
Severely discharged battery
mediumA plausible cause — test and verify before replacing parts.
Related help
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