P2668 — Fuel Mode Indicator Lamp Control Circuit

What Does P2668 Mean?

P2668 is a diagnostic trouble code indicating: Fuel Mode Indicator Lamp Control Circuit. This code relates to the powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P2668

⚠️ Check Engine Light (MIL) illuminated
⚠️ Erratic Fuel Mode Indicator Lamp readings
⚠️ Related system operating intermittently
⚠️ Reduced engine performance

Common Causes

🔍 Wiring issue in Fuel Mode Indicator Lamp circuit (damaged, chafed, or corroded)
🔍 Faulty Fuel Mode Indicator Lamp connector or terminal
🔍 Failed Fuel Mode Indicator Lamp
🔍 ECM/PCM connection issue

Frequently Asked Questions

What does P2668 mean?

P2668 indicates: Fuel Mode Indicator Lamp Control Circuit. The vehicle's computer has detected that the Fuel Mode Indicator Lamp is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P2668?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P2668 for extended periods may cause additional problems.

How much does it cost to fix P2668?

Repair costs for P2668 typically range from $80 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

🔧 Inspect and repair Fuel Mode Indicator Lamp wiring and connectors
🔧 Replace faulty Fuel Mode Indicator Lamp

1
Find your vehicle above
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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.

P2668: Fuel Mode Indicator Lamp Control Circuit