Skip the auto shop - Our mechanics make house calls

B1394 OBD-II Trouble Code: Power Door Memory Lock Relay Circuit Short to Battery

diagnostic check engine light

B1394 code definition

The B1394 trouble code detects an error with the power door memory lock relay circuit.

What the B1394 code means

The B1394 code is a generic OBD-II trouble code that signals a circuit malfunction from the power door memory lock relay. The power door memory lock system is a customizable system in the power door lock and unlock system. It allows the driver to choose when the system should automatically lock and unlock certain doors. For instance, the power door memory lock system can be used to automatically lock all of the doors when the vehicle eclipses 20 MPH, and to unlock only the driver’s door when the car is turned off. If a circuit error from the power door memory lock relay is detected by the powertrain control module (PCM) or the body control module, then the B1394 code will likely be stored.

What causes the B1394 code?

Causes of the B1394 include:

What are the symptoms of the B1394 code?

If the B1394 code is detected, then the power door memory lock system will probably be disabled. That means that all preset automatic lock and unlock settings will not be enacted.

How does a mechanic diagnose the B1394 code?

The B1394 code will be diagnosed using a standard OBD-II trouble code scanner. A certified mechanic will use the scanner to view the freeze frame data, assess the B1394 code, and check for the existence of other trouble codes. If multiple trouble codes are present, then they will need to be diagnosed in the order in which they are displayed. The mechanic will then reset the trouble codes, restart the vehicle, and see if the code remains present. If not, then it was probably inaccurately triggered, or may represent an intermittent issue.

If the B1394 code is still detected, then the technician will visually inspect the wires in the power door memory lock system, and replace any that are broken, frayed, or short. The connectors, harnesses, and fuses should also be checked at this point, followed by the input and output voltage of the circuit. The power door memory lock relay will then need to be inspected.

After any component is replaced or repaired, the trouble codes will be reset, the vehicle restarted, and the B1394 code checked for. This allows the technician to see as soon as the issue is resolved.

Common mistakes when diagnosing the B1394 code

The most common error when addressing this code comes from a failure to properly follow the OBD-II diagnosis protocol. Technicians should always abide by the protocol, as this helps guarantee inspections that are efficient, and repairs that are accurate.

Fully operative power door memory lock circuits and relays are commonly replaced because damaged wiring was never checked for.

How serious is the B1394 code?

The B1394 code won’t keep a car from being drivable, or cause any long term severe damage, though it will likely keep the power door memory lock system from working. It’s always a smart idea to have a vehicle inspected when any trouble code is detected.

What repairs can fix the B1394 code?

Potential repairs for the B1394 trouble code are:

Additional comments for consideration regarding the B1394 code

The B1394 code is only applicable to vehicles that have a power door memory lock feature.

Need help with a B1394 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...


Related questions

Q: While I'm driving the accelerator disengages and it won't accelerate with the gas pedal pressed all the to the floor.

This loss of accelerator control is a built in safety feature of the vehicle computer and can render the throttle inactive if it sees a problem in a major component or loses communication with the throttle sensor. I have even...

Q: ABS light on dash board

Hello. Since this could be a variety of potential issues, I would recommend hooking the car up to an OBD scanner to download any trouble codes that may have registered as a result of the light coming on. I would...

Q: P0420 - CATALYST B1 DETERIORATION

Hello - it is possible the 2 problems are related, but likely only over a long period of time. The P0420 code is a "low efficiency catalytic converter" for Bank2 - which include cylinder 1. And yes, that warning is...