Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there is a problem with the car's system that controls alternative fuel, like electricity or natural gas. It's like when a toy's battery is too low to make it work properly.
The P25C0 code is triggered when the Engine Control Module (ECM) detects a low voltage condition in the circuit that controls the alternative fuel disable function.
The P25C0 code indicates that the voltage in the alternative fuel disable control circuit is below the expected range. This could be due to a wiring issue, a faulty control module, or a problem with the alternative fuel system itself. The ECM monitors this circuit to ensure that the vehicle can switch between fuel types as needed.
• Check Engine Light is on
• Vehicle may not switch to alternative fuel
• Possible reduction in fuel efficiency
• Faulty alternative fuel disable control module
• Damaged or corroded wiring or connectors
• Low battery voltage or poor electrical connections
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the voltage in the alternative fuel disable control circuit.
• Repair or replace damaged wiring or connectors.
• Replace the alternative fuel disable control module if faulty.
• Ensure battery and electrical connections are secure.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $500
Moderate
• Chevrolet Volt
• Toyota Prius
• Nissan Leaf
• Regularly inspect and maintain wiring and connectors.
• Ensure battery is in good condition.
• Perform routine checks of the alternative fuel system.
Sensor Issue
• Avoid using alternative fuel until the issue is resolved.
• Consult a professional mechanic for a thorough diagnosis.
Check your vehicle's warranty as some components may be covered under emissions warranties.
The P25C0 code has been reported in hybrid and alternative fuel vehicles, often related to wiring issues.
Moderate – It is advisable to address this issue soon to ensure proper vehicle operation.
Driving with this code may not be illegal, but it could lead to increased emissions or reduced fuel efficiency.
• Vehicle in park or neutral
• Engine running
The alternative fuel disable control module is typically located near the vehicle's fuel system components or within the engine compartment.
Q: Can I drive my car with the P25C0 code?
A: While you can drive the car, it's best to fix the issue to avoid potential problems with fuel efficiency or emissions.
Q: What happens if I ignore the P25C0 code?
A: Ignoring the code could lead to further issues with the alternative fuel system and reduced vehicle performance.
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