Code result
P25C2
Alternative Fuel Disable Signal Circuit High
Moderate severity
What it means
The disable feedback signal sits above its valid window. Typical cause is a short to battery on the feedback wire or a failed pull-up in the input stage.
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 a B+ supply
highOne of the most commonly reported causes for this code — check this first.
Pull-up resistor in the input stage failed
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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