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B1982 is a diagnostic trouble code (DTC) for "Driver's Door Unlock Relay Circuit Failure". 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.
A B1982 trouble code indicates that the vehicle's Engine Control Unit (ECU) has registered an unspecified failure relating to the driver's side front door's unlock relay circuit.
The unlock relay transmits commands from a vehicle's power lock feature (such as a remote fob) to unlock the vehicle. In the case of a B1982 trouble code, the circuit meant to relay this command has suffered an unspecified failure, most likely caused by damaged or faulty wiring.
A B1982 trouble code is often caused by improperly installed, damaged, faulty or otherwise problematic wiring. Damaged or loose wiring can sometimes be explained by a recent crash impact. In some rare occurrences, the ECU itself may be reporting the code falsely.
If the unlock relay circuit has failed, the driver side's lock won't be able to receive commands to unlock itself via electronic command. A remote key fob may not work properly. As a result, the B1982 may present an inconvenience to the operator, despite not technically affecting the vehicle's drivability. In addition, the B1982 trouble code will come with a stored code in the ECU and an illuminated check engine lamp. These latter symptoms are present in a purely diagnostic context, and may be disregarded as son as the specific problem has been identified.
The B1982 code may be first identified by reading the ECU with an OBD-II scanner. When the issue has been pinpointed to the driver side's unlock relay circuit, the circuit should be accessed by unscrewing the access panel and inspecting the circuit accordingly for signs that could explain the circuit failure. These signs include disconnected and improperly wired circuitry, damaged, corroded or faulty wiring, and damaged, faulty or corroded components.
The B1982 is a body-related (or "B-class") trouble code. Codes within this category may describe different issues depending on the type of vehicle and its manufacturer. Although your OBD-II code scanner may specify the code description for you, make sure that you don't confuse one code description for another. This can result in needless repairs for functional components, and will leave the actual problem unresolved. Refer to your vehicle manual if you're unsure.
An unreliable locking mechanism won't pose a threat to the vehicle's drivability or its safety. You can always work around it by unlocking the door manually by reaching over and opening it from the inside, or using a physical key. These simple workarounds make the B1982 code a fairly mild concern, but the lost convenience may be enough to convince operators to fix the issue promptly. Address the code at your own discretion.
The wiring (along with any problematic connectors) should be rewired, repaired, or even replaced depending on the severity of the noted wiring issue. In the rare case that the ECU is faulty, it may need to be reprogrammed or replaced instead of the deflate circuit components. Once repairs for the B1982 trouble code have been finished, the vehicle should be restarted. Doing so will allow the trouble code to recur if it hasn't been properly addressed already.
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.
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