Code result
P2500
Generator Lamp/L-Terminal Circuit Low
Moderate severity
What it means
The L-terminal feedback line from the alternator (charging warning lamp circuit) reads below the lower limit. The lamp may stay on, and battery voltage may drift if regulation feedback is also affected.
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
L-terminal shorted to ground
highOne of the most commonly reported causes for this code — check this first.
Alternator regulator failed
mediumA plausible cause — test and verify before replacing parts.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Related help
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