P1595 — Automatic Transmission Diagnosis Input Signal Circuit Low Input

What Does P1595 Mean?

P1595 is a manufacturer-specific diagnostic trouble code: Automatic Transmission Diagnosis Input Signal Circuit Low Input. This code applies to SUBARU, DODGE, JEEP, PLYMOUTH, PONTIAC 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 P1595

⚠️ Check Engine Light (MIL) illuminated
⚠️ Automatic Transmission Diagnosis Input 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 Automatic Transmission Diagnosis Input Signal circuit
🔍 Poor ground connection at Automatic Transmission Diagnosis Input Signal
🔍 Faulty Automatic Transmission Diagnosis Input Signal with no output signal
🔍 Disconnected or loose Automatic Transmission Diagnosis Input Signal connector
🔍 Blown fuse in related circuit

Frequently Asked Questions

What does P1595 mean?

P1595 indicates: Automatic Transmission Diagnosis Input Signal Circuit Low Input. The vehicle's computer has detected that the Automatic Transmission Diagnosis Input Signal is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1595?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1595 for extended periods may cause additional problems.

How much does it cost to fix P1595?

Repair costs for P1595 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 Automatic Transmission Diagnosis Input Signal circuit
🔧 Clean and secure Automatic Transmission Diagnosis Input Signal connector and ground points
🔧 Replace failed Automatic Transmission Diagnosis Input 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.

P1595: Automatic Transmission Diagnosis Input Signal Circuit Low Input