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

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the B1393 code

B1393 is a diagnostic trouble code (DTC) for "Power Door Memory Lock Relay Circuit Open". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE B1393 DIAGNOSTIC Get a fair and transparent estimate upfront

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.

trouble codes
OBD-II
B1393

No more waiting rooms! Our mechanics will come to you to diagnose and fix the B1393 code.

SCHEDULE B1393 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

5,170

Rating Summary
4,765
197
50
27
131
4,765
197
50
27
131

Fred

16 years of experience
364 reviews
Fred
16 years of experience
Mercedes-Benz E500 - Check Engine Light is on - Conroe, Texas
Fred was very friendly and thorough to get to the root of the issue. Even when he could not find a fault to why my engine light was on, he went above and beyond to make absolutely sure that the concern was minimized. Turns out, all that needed to be done was a reset but his diagnostic to address my issues was very intricate and appreciated.

David

17 years of experience
37 reviews
David
17 years of experience
Chevrolet Cruze - Check Engine Light is on - Aurora, Colorado
David was on time, professionalisms & honest! I would definitely request him again and pass along to friends/family.

John

18 years of experience
18 reviews
John
18 years of experience
Dodge Ram 1500 - Check Engine Light is on - Memphis, Tennessee
Demonstrated good integrity. Advised me when work I thought needed done was unnecessary and was helpful in identifying issues that needed to be addressed

Robert

21 years of experience
17 reviews
Robert
21 years of experience
Chrysler 200 - Check Engine Light is on - Fort Worth, Texas
Robert did a good job working on my car and letting me know what's needed to keep my car driving smoothly.


More related articles

P0472 OBD-II Trouble Code: Exhaust Pressure Sensor Low
P0472 code means there is a problem with your electrical circuit, often due to issues with the back pressure sensor.
B1982 OBD-II Trouble Code: Driver's Door Unlock Relay Circuit Failure
B1982 means there is a bad circuit for the driver door unlock feature. This is likely due faulty defective electrical wiring.
P0048 OBD-II Trouble Code: Turbo/Super Charger Boost Control Solenoid Circuit High
P0048 P0048 Trouble Code definition Turbo/Super Charger Boost Control Solenoid Circuit High What the P0048 code means This code has varied definitions as provided by the manufacturer. The code means that the ECU (Engine Control Unit) has detected an out...

Related questions

Egr solenoid

Hi there. Once these parts are replaced you need to do the test procedure with the same plug otherwise the light will remain on. If you did the reset then the circuit will need to be tested. It can also...

My van was missing and rough idling then I turned it off one day and the next day it starts then dies and some times it won't start

Hello, thanks for writing in about your 2001 Dodge Caravan. For certain, given your mileage and codes for these 2 components, replacing these 2 sensors is the minimum. Cleaning the idle air control valve, throttle body, and PCV valve should...

Mass air flow issues

Try taking the mass air flow sensor out and cleaning it as these can often times trigger a code simply as a result of just being dirty. By far the most common MAF failure is caused by accumulation of dirt...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com