P25C1

Alternative Fuel Disable Signal Circuit

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Engine transition to emergency mode
Increased fuel consumption
Reduced engine power
Check Engine light comes on
Problems with switching between fuel types

Causes

Open or short circuit in signal circuit
Alternate fuel sensor malfunction
Problems with the engine control unit
Wiring harness damage
Faulty relay or fuse

How to Fix

Check the integrity of wiring and connectors
Check alternative fuel sensor
Diagnose the engine control unit
Check relays and fuses
If necessary, replace faulty components

Related codes

P25C0 P25C2 P25C3