P1401 — DPFE Circuit High Input

What Does P1401 Mean?

P1401 is a diagnostic trouble code indicating: DPFE Circuit High Input. This code relates to the manufacturer-specific powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P1401

⚠️ Check Engine Light (MIL) illuminated
⚠️ DPFE reading stuck at maximum value
⚠️ Related system operating erratically or in default mode
⚠️ Reduced engine performance

Common Causes

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

Frequently Asked Questions

What does P1401 mean?

P1401 indicates: DPFE Circuit High Input. The vehicle's computer has detected that the DPFE is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1401?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1401 for extended periods may cause additional problems.

How much does it cost to fix P1401?

Repair costs for P1401 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 DPFE wiring for short to voltage
🔧 Clean or replace corroded DPFE connector
🔧 Replace faulty DPFE

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.

P1401: DPFE Circuit High Input