P1794: Powertrain Control Module Battery Direct Power Circuit

MAZDA NISSAN OTHER KIA 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 P1794 Mean?

P1794 is a manufacturer-specific diagnostic trouble code: Powertrain Control Module Battery Direct Power Circuit. This code applies to MAZDA, NISSAN, OTHER, KIA, JAGUAR 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 P1794

⚠️ Check Engine Light (MIL) illuminated
⚠️ Erratic Powertrain Control Module Battery Direct Power readings
⚠️ Related system operating intermittently
⚠️ Reduced engine performance

Common Causes

🔍 Wiring issue in Powertrain Control Module Battery Direct Power circuit (damaged, chafed, or corroded)
🔍 Faulty Powertrain Control Module Battery Direct Power connector or terminal
🔍 Failed Powertrain Control Module Battery Direct Power
🔍 ECM/PCM connection issue

Frequently Asked Questions

What does P1794 mean?

P1794 indicates: Powertrain Control Module Battery Direct Power Circuit. The vehicle's computer has detected that the Powertrain Control Module Battery Direct Power is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1794?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1794 for extended periods may cause additional problems.

How much does it cost to fix P1794?

Repair costs for P1794 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 Powertrain Control Module Battery Direct Power wiring and connectors
🔧 Replace faulty Powertrain Control Module Battery Direct Power

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.