P23D0 — Fuel Heater Control Module Feedback Signal Circuit High

What Does P23D0 Mean?

P23D0 is a diagnostic trouble code indicating: Fuel Heater Control Module Feedback Signal Circuit High. This code relates to the powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P23D0

⚠️ Check Engine Light (MIL) illuminated
⚠️ Fuel Heater Control Module Feedback Signal reading stuck at maximum value
⚠️ Related system operating erratically or in default mode
⚠️ Reduced engine performance

Common Causes

🔍 Short to voltage in Fuel Heater Control Module Feedback Signal wiring harness
🔍 Corroded or water-damaged Fuel Heater Control Module Feedback Signal connector
🔍 Faulty Fuel Heater Control Module Feedback Signal outputting maximum voltage
🔍 Damaged wiring rubbing against metal components
🔍 ECM/PCM internal fault (rare)

Frequently Asked Questions

What does P23D0 mean?

P23D0 indicates: Fuel Heater Control Module Feedback Signal Circuit High. 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 P23D0?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P23D0 for extended periods may cause additional problems.

How much does it cost to fix P23D0?

Repair costs for P23D0 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

🔧 Inspect and repair Fuel Heater Control Module Feedback Signal wiring for short to voltage
🔧 Clean or replace corroded Fuel Heater Control Module Feedback Signal connector
🔧 Replace faulty 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.

P23D0: Fuel Heater Control Module Feedback Signal Circuit High