B1983 OBD-II Trouble Code: Driver's Door Unlock Relay Circuit Short to Battery

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


Cost of diagnosing the B1983 code

B1983 is a diagnostic trouble code (DTC) for "Driver's Door Unlock Relay Circuit Short to Battery". 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 for $154.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $50.0 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 $154.99 $50.0
Toyota $154.99 $50.0
BMW $164.99 $50.0

*Estimates may vary by market

SCHEDULE B1983 DIAGNOSTIC Get a fair and transparent estimate upfront

B1983 code definition

A B1983 trouble means that your vehicle's Engine Control Unit (ECU) has registered a short circuit issue in the unlock relay circuit for the driver's door.

What the B1983 code means

The unlock relay circuit is in charge of receiving and relaying electrical unlock commands from devices such as a remote fob. In the event of a B1983 code, this circuit has suffered a short, and the vehicle's convenient "power lock" feature won't likely function as a result.

What causes the B1983 code?

Poorly wired and faulty wiring are common causes for a B1983 trouble code. Damaged or loose wiring can sometimes be explained by a recent crash impact. In a handful of B1983 cases, the ECU itself may be faulty, and reporting the trouble code falsely as a result. Although this shouldn't be realistically considered until the circuit-related potential causes have been ruled out, it may be looked into if you can't find anything wrong with the unlock circuit.

What are the symptoms of the B1983 code?

If the driver's door unlock relay circuit has been shorted out, it's very likely that the unlock feature of the driver's door will malfunction. At the least, the lock feature will operate unreliably. The B1983 will come alongside a stored trouble code and illuminated check engine lamp on the dashboard. These symptoms should be considered in a purely diagnostic context, and should be disregarded once the specific code problem has been identified.

How does a mechanic diagnose the B1983 code?

Diagnosing the B1983 trouble code usually begins with a mechanic scanning the ECU with an OBD-II code reader. All electrical wiring relating to the unlocking circuit (including connectors) should be inspected and scanned for the source of the circuit short. Improperly wired, damaged, disconnected and otherwise faulty wiring should be sought out and noted when found. Potentially blown fuses, circuit-related components and the battery charging the system should all be looked over for signs of damage and fault. In addition, components that may have otherwise been fine may have suffered damage for the circuit short.

Common mistakes when diagnosing the B1983 code

Body-related (or B-class) trouble codes may define different issues depending on the make and model of vehicle. Inexperienced mechanics can misinterpret the code's meaning. If code descriptions are mistaken, this will result in unnecessary repairs and expense, all the while doing nothing to solve the real issue.

How serious is the B1983 code?

An unreliable unlocking mechanism won't have any effect on the technical drivability of the vehicle. However, not being able to open or properly unlock the driver's seat door can pose issues of convenience. Luckily, physical workarounds (such as a physical key) can be used in lieu of the fob or electrical controls. As such, the B1983 trouble code should not be considered an urgent concern, although some vehicle users will find the inconvenience enough to make repairs swiftly.

What repairs can fix the B1983 code?

If any components (including the system's charging battery) have been identified as damaged, faulty or broken, they'll need to be replaced or repaired according to the severity of the issue. Any wiring that's been found to be damaged, disconnected or otherwise problematic should be addressed as needed. If the ECU has been found out as faulty, it will require replacement or reprogramming. Once you've made repairs to address the B1983 locking problem, restart the vehicle and test the lock. Doing so immediately will let you know whether or not the issue has been properly addressed.

Additional comments for consideration regarding the B1983 code

The process of repairing a locking mechanism will vary based on the type of lock system the vehicle is equipped with. Single wire systems are generally the easiest to repair, although more modern vehicles are typically equipped with tripe wire or even vacuum-engaged locking systems.

Need help with a B1983 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.

OBD-II
trouble codes
B1983

No more waiting rooms! Our mechanics will come to you to diagnose and fix the B1983 code.

SCHEDULE B1983 DIAGNOSTIC
Get a $50 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(8600)

Rating Summary
8017
273
65
46
199
8017
273
65
46
199
 at YourMechanic

Brandon

9 years of experience
133 reviews
Brandon
9 years of experience
Ford Escort L4-2.0L - Check Engine Light is on - Nashville, Tennessee
Brandon showed up ahead of schedule, was very personable and diagnosed my problems. He also scheduled my next appointments which will be with him.
 at YourMechanic

William

23 years of experience
33 reviews
William
23 years of experience
Lexus IS250 V6-2.5L - Check Engine Light is on - Mableton, Georgia
Arrived early which was great. William was courteous, and attentive to the issue. Even though it took several attempts I'm so happy he was determined to fix it and he did!
 at YourMechanic

Dan

40 years of experience
1080 reviews
Dan
40 years of experience
Plymouth Grand Voyager - Check Engine Light is on - Lawrenceville, Georgia
Mr. Dan Barber was quite patient, courteous and quite knowledgeable. From my observation, Mr. Barber appears to be quite professional.
 at YourMechanic

Christopher

9 years of experience
120 reviews
Christopher
9 years of experience
Ford Fiesta L4-1.6L - Check Engine Light is on - Smyrna, Georgia
Chris communicated with us each step of the way up until his arrival. He listened well, was knowledgeable, and was prepared. He took the time to diagnose the problem, explained the what, why and how and provided a solution. I would definitely recommend him and will use him again.


More related articles

P0533 OBD-II Trouble Code: A/C Refrigerant Pressure Sensor Circuit High Input
P0533 means the A/C refrigerant pressure is too high to safely function often due to inoperative cooling fans or too little or too much refrigerant.
P0573 OBD-II Trouble Code: Cruise Control/Brake Switch A Circuit High
P0573 code means there is an electrical malfunction affecting your vehicle’s brake switch “A” often due too a faulty cruise control switch.
P0632 OBD-II Trouble Code: Odometer Not Programmed – ECM/PCM
P0632 means that the PCM is unable to read the odometer due to battery in the vehicle becoming discharged or for electrical reasons.

Related questions

My car won't let me drive passed 2500 rpm. And I have no idea why it is doing that when I recently bought it.
The reason it will not go over 2500 rpm is because the computer is in limp mode. This mode is for when the computer has a failure in it. Limp mode will trigger if there is an issue with one...
Good morning Patrick, I have a 2007 Pontiac torrent. It refuses to accelerate and when u try to give full acceleration, it starts
Your computer is trying to protest the motor by going into failure mode and limiting the throttle opening. The overheating is the cause of the problem. You need to have the cooling system checked to see if there are any...
P0786 code ford glaxay, gear shifting jurk or slip
This is a common code related to the MAP sensor. This can happen for a variety of reasons such as something as simple as a dirty mass air flow sensor (https://www.yourmechanic.com/services/mass-airflow-sensor-replacement) which could be causing inaccurate fuel trim adjustments to...

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