P1722: Auto Trans Diagnosis Input Signal High Input

SUBARU FORD LINCOLN MAZDA MERCURY OTHER JAGUAR

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 P1722 Mean?

P1722 is a manufacturer-specific diagnostic trouble code: Auto Trans Diagnosis Input Signal High Input. This code applies to SUBARU, FORD, LINCOLN, MAZDA, MERCURY 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 P1722

⚠️ Check Engine Light (MIL) illuminated
⚠️ Abnormal signal from Auto Trans Diagnosis Input
⚠️ Related system may operate erratically
⚠️ Reduced engine performance

Common Causes

🔍 Auto Trans Diagnosis Input producing abnormal signal
🔍 Electromagnetic interference affecting Auto Trans Diagnosis Input signal
🔍 Wiring issue distorting Auto Trans Diagnosis Input signal

Frequently Asked Questions

What does P1722 mean?

P1722 indicates: Auto Trans Diagnosis Input Signal High Input. The vehicle's computer has detected that the Auto Trans Diagnosis Input is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1722?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1722 for extended periods may cause additional problems.

How much does it cost to fix P1722?

Repair costs for P1722 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 Auto Trans Diagnosis Input and related wiring
🔧 Replace faulty Auto Trans Diagnosis Input

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.