Code result
P25C3
Alternative Fuel Disable Signal Circuit Low
Moderate severity
What it means
The disable feedback signal sits below its valid window. Usually a short to ground or an open pull-up that lets the input float low.
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
Feedback wire shorted to ground
highOne of the most commonly reported causes for this code — check this first.
Open pull-up resistor in the controller input
lowLess common, but worth ruling out after the more likely causes.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Related help
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