P23CF — Fuel Heater Control Module Feedback Signal Circuit Low

What Does P23CF Mean?

P23CF is a diagnostic trouble code indicating: Fuel Heater Control Module Feedback 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 P23CF

⚠️ Check Engine Light (MIL) illuminated
⚠️ Fuel Heater Control Module Feedback 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 Fuel Heater Control Module Feedback Signal circuit
🔍 Poor ground connection at Fuel Heater Control Module Feedback Signal
🔍 Faulty Fuel Heater Control Module Feedback Signal with no output signal
🔍 Disconnected or loose Fuel Heater Control Module Feedback Signal connector
🔍 Blown fuse in related circuit

Frequently Asked Questions

What does P23CF mean?

P23CF indicates: Fuel Heater Control Module Feedback Signal Circuit Low. The vehicle's computer has detected that the Fuel Heater Control Module Feedback Signal is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P23CF?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P23CF for extended periods may cause additional problems.

How much does it cost to fix P23CF?

Repair costs for P23CF 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 Heater Control Module Feedback Signal circuit
🔧 Clean and secure Fuel Heater Control Module Feedback Signal connector and ground points
🔧 Replace failed Fuel Heater Control Module Feedback 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.

P23CF: Fuel Heater Control Module Feedback Signal Circuit Low