P25C3 — Alternative Fuel Disable Signal Circuit Low

What Does P25C3 Mean?

P25C3 is a diagnostic trouble code indicating: Alternative Fuel Disable Signal Circuit Low. This code relates to the powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P25C3

⚠️ Check Engine Light (MIL) illuminated
⚠️ Alternative Fuel Disable Signal reading at zero or minimum value
⚠️ Related system not functioning or in fail-safe mode
⚠️ Reduced engine performance

Common Causes

🔍 Open or broken wire in Alternative Fuel Disable Signal circuit
🔍 Poor ground connection at Alternative Fuel Disable Signal
🔍 Faulty Alternative Fuel Disable Signal with no output signal
🔍 Disconnected or loose Alternative Fuel Disable Signal connector
🔍 Blown fuse in related circuit

Frequently Asked Questions

What does P25C3 mean?

P25C3 indicates: Alternative Fuel Disable Signal Circuit Low. The vehicle's computer has detected that the Alternative Fuel Disable Signal is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P25C3?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P25C3 for extended periods may cause additional problems.

How much does it cost to fix P25C3?

Repair costs for P25C3 typically range from $20 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Repair broken wire or restore ground in Alternative Fuel Disable Signal circuit
🔧 Clean and secure Alternative Fuel Disable Signal connector and ground points
🔧 Replace failed Alternative Fuel Disable Signal

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P25C3: Alternative Fuel Disable Signal Circuit Low