B1394 Code: Meaning, Symptoms, Causes & Fix

Overview

Code B1394 indicates a fault in Power Door Memory Lock Relay Circuit Short To Battery, typically within body electronics and comfort modules.

Symptoms

battery draw complaints
related warning lamp illuminated
module resets or glitches

Common causes

Broken terminal inside harness affecting power door memory lock relay circuit short to battery
Open circuit in wiring
Connector pin damage/corrosion or harness stress near related components

How to diagnose B1394

Confirm B1394 and capture freeze-frame data with a professional scan tool.
Inspect wiring, connectors, and grounds related to power door memory lock relay circuit short to battery for obvious defects.
Use a continuity test from module pin to component to identify opens/high resistance.
Check for related DTCs to identify the root-cause chain before replacing parts.
After repair, clear codes and confirm readiness monitors complete without recurrence.

Severity of code B1394

Moderate: This code is moderate severity: the vehicle may still operate, but fault progression can increase repair cost over time.

Can you drive with B1394?

Most vehicles can be driven short-term with B1394, but postpone heavy load/highway driving until repaired.

If the warning lamp is flashing or drivability/safety is affected, avoid driving and diagnose immediately.

How to fix it (step-by-step)

Repair obvious wiring/connector faults first to prevent repeat parts replacement.
Address the root fault mode (open) in the power door memory lock relay circuit short to battery circuit/system.
Apply the required relearn/adaptation procedure if specified by service information.
Road-test and verify B1394 remains cleared under the conditions that originally set the code.

Fix options

Clear corrosion and protect terminals.
Repair open circuit and secure connector lock.
Clear DTCs and verify with live data and completed drive cycle.

Typical repair cost

$160-$850

Common mistakes when diagnosing B1394

Replacing parts without verifying voltage, ground, and signal integrity first.
Ignoring related stored/pending codes that indicate upstream faults.
Skipping post-repair verification drive cycle and readiness checks.

B1394 in common vehicles

B1394 appears across makes such as Nissan, Hyundai, Kia, Volkswagen. Failure patterns differ by platform: wiring routes, software calibration, and component supplier revisions can change root cause.

Frequently asked questions

What causes B1394?

B1394 is commonly set by open faults affecting power door memory lock relay circuit short to battery.

How much does it cost to fix B1394?

For B1394, repair costs are typically $160-$850 depending on exact root cause, labor rates, and part quality.

Can I clear B1394 without repair?

You can clear B1394 temporarily, but the code usually returns until the underlying fault is corrected.