P25A6 — Fuel Mode Select Switch Circuit Low

What Does P25A6 Mean?

P25A6 is a diagnostic trouble code indicating: Fuel Mode Select Switch 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 P25A6

⚠️ Check Engine Light (MIL) illuminated
⚠️ Fuel Mode Select Switch 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 Fuel Mode Select Switch circuit
🔍 Poor ground connection at Fuel Mode Select Switch
🔍 Faulty Fuel Mode Select Switch with no output signal
🔍 Disconnected or loose Fuel Mode Select Switch connector
🔍 Blown fuse in related circuit

Frequently Asked Questions

What does P25A6 mean?

P25A6 indicates: Fuel Mode Select Switch Circuit Low. The vehicle's computer has detected that the Fuel Mode Select Switch is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P25A6?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P25A6 for extended periods may cause additional problems.

How much does it cost to fix P25A6?

Repair costs for P25A6 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 Fuel Mode Select Switch circuit
🔧 Clean and secure Fuel Mode Select Switch connector and ground points
🔧 Replace failed Fuel Mode Select Switch

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.

P25A6: Fuel Mode Select Switch Circuit Low