Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. B1393 OBD-II Trouble Code: Power Door Memory Lock Relay Circuit Open

B1393 OBD-II Trouble Code: Power Door Memory Lock Relay Circuit Open

diagnostic check engine light

B1393 code definition

The B1393 trouble code notes a circuit malfunction with the power door memory lock relay.

What the B1393 code means

The B1393 code is a standard OBD-II trouble code that detects an issue with the power door memory lock relay circuit. The Power door memory lock system is an automatic system that can be customized by the driver to control when the power doors are locked and unlocked. This system can be customized to lock the doors when the car reaches a certain speed, unlock a single door when the vehicle is placed in the Park position, and many other things. If the powertrain control module (PCM) or body control module not an abnormal voltage signal from the power door memory lock relay circuit, then the B1392 trouble code may be triggered.

What causes the B1393 code?

The B1393 trouble code can be a result of:

What are the symptoms of the B1393 code?

The B1393 trouble code usually means that the power door memory lock system will not work. Any memory lock or unlock settings will likely fail to operate.

How does a mechanic diagnose the B1393 code?

The B1393 code should be diagnosed using an OBD-II trouble code scanner. A reputable mechanic can use the scanner to view the freeze frame data and assess the code, and also to check for additional trouble codes that may be present. If there are numerous codes detected, then the will need to be addressed in the order that they are displayed in. Next, the trouble codes will be reset, and the vehicle restarted, so the mechanic can see if the B1393 code remains detected. If it does not, then it was likely the result of an intermittent error, or possible an erroneous trigger.

If the B1393 code is still detected, then the technician will visually inspect the power door lock wires, and repair or replace any damaged wires. While inspecting the wiring, the connectors and fuses should be visually inspected as well. Next, the circuit will be checked, and then the power door memory lock relay should be tested.

Whenever the mechanic repairs or replaces a component, the trouble codes should again be reset, the vehicle restarted, and the B1393 code looked for. This will allow the mechanic to know when the problem has been fixed.

Common mistakes when diagnosing the B1393 code

The most common mistake when diagnosing this code is the failure to follow the OBD-II trouble code diagnosis protocol. It is imperative that the protocol always be adhered to be mechanics, as it helps guarantee a thorough and efficient diagnosis, and a repair that is devoid of erroneous replacements.

Properly working power door memory lock circuits are frequently unnecessarily replaced because the wiring was not first inspected.

How serious is the B1393 code?

The B1393 trouble code will likely impact the power door memory lock system, though it won’t cause any drivability concerns. Still, the vehicle should be inspected as soon as the code is noticed.

What repairs can fix the B1393 code?

Common repairs for the B1393 trouble code are:

Additional comments for consideration regarding the B1393 code

This code will only appear in vehicle that have the power door memory lock feature.

Need help with a B1393 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

Symptoms of a Bad or Failing Flexible Clutch Hose
Common signs include difficulty shifting, low clutch fluid, and feeling no resistance at the clutch pedal.
P0121 OBD-II Trouble Code: TPS "A" Circuit Range Performance Problem
P0121 code definition Throttle Pedal Position Sensor/Switch (TPS) A Circuit Range Performance Problem...
The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....


Related questions

Q: P0101

Hello. P0101 is the code for an issue with the MAF sensor signal or circuit. P0101 indicates that the computer has detected the MAF signal has fallen out of the acceptable range. This is usually caused by a faulty MAF...

Q: Can't read OBD code with my scanner.

These aftermarket type scanners may not access every vehicle out there. When you get a cannot communicate issue this is most likely the OBD adapter and the vehicle may be incompatible or the vehicle has problems. You would need to...

Q: Car cranking problem being a bad fuse box?

Fuse boxes can and do go bad every once in a while. While it is rather rare, it is not unheard of. If there has been any sort of damage in the area, these are more likely to fail. The...