What are the common causes of P25C0?

A short to ground on the alternative fuel disable control wire. A stuck alternative fuel disable solenoid. A chafed disable control wire grounding on the chassis. A corroded connector shorting the disable circuit.

Read alternative fuel disable control status on a scan tool. Test the disable control wire for a short to ground. Command the disable solenoid and listen for it to change state. Inspect the disable control harness for chafing. Replace the alternative fuel disable solenoid if it stays energized. Clear the code and retest.

P25C0

Alternative Fuel Disable Control Circuit Low

System: Speed and idle control (P code)
Lamp: Check Engine Light
Category: Powertrain - Computer and Auxiliary Controls

What it means

P25C0 means Alternative Fuel Disable Control Circuit Low.

Check these first

A short to ground on the alternative fuel disable control wire
A stuck alternative fuel disable solenoid
A chafed disable control wire grounding on the chassis
A corroded connector shorting the disable circuit

What to do next

Read alternative fuel disable control status on a scan tool
Test the disable control wire for a short to ground
Command the disable solenoid and listen for it to change state
Inspect the disable control harness for chafing
Replace the alternative fuel disable solenoid if it stays energized
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.