P1405: Differential Pressure Feedback Electronic Sensor Circuit Upstream Hose

FORD LINCOLN MERCURY BMW BUICK CADILLAC CHEVY CHRYSLER

Severity

Medium

System

Manufacturer-Specific Powertrain

Last reviewed: Jan 1, 0001 Last updated: Jan 1, 0001

Methodology: We combine code standards with complaint and reliability patterns, then review for clear, vehicle-first diagnosis steps.

Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).

Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.

What Does P1405 Mean?

P1405 is a manufacturer-specific diagnostic trouble code: Differential Pressure Feedback Electronic Sensor Circuit Upstream Hose. This code applies to FORD, LINCOLN, MERCURY, BMW, BUICK vehicles. Unlike generic OBD-II codes, manufacturer-specific codes are defined by the vehicle maker and may only apply to certain makes and models.

Symptoms of P1405

⚠️ Check Engine Light (MIL) illuminated
⚠️ Erratic Differential Pressure Feedback Electronic Sensor readings
⚠️ Related system operating intermittently
⚠️ Reduced engine performance

Common Causes

🔍 Wiring issue in Differential Pressure Feedback Electronic Sensor circuit (damaged, chafed, or corroded)
🔍 Faulty Differential Pressure Feedback Electronic Sensor connector or terminal
🔍 Failed Differential Pressure Feedback Electronic Sensor
🔍 ECM/PCM connection issue

Frequently Asked Questions

What does P1405 mean?

P1405 indicates: Differential Pressure Feedback Electronic Sensor Circuit Upstream Hose. The vehicle's computer has detected that the Differential Pressure Feedback Electronic Sensor is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1405?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1405 for extended periods may cause additional problems.

How much does it cost to fix P1405?

Repair costs for P1405 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 Differential Pressure Feedback Electronic Sensor wiring and connectors
🔧 Replace faulty Differential Pressure Feedback Electronic Sensor

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.