B1982 — Device Power Circuit High

OBD2 code B1982 flags a problem with the body electrical system (B1982 — device power circuit high: causes, symptoms & fix). The car is usually drivable while you plan the repair. Common culprits: faulty switch, motor or actuator of the affected system, corroded or loose connectors, body control module (BCM) fault.

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Is it safe to drive?

Short-term driving is OK Usually safe to drive — body codes rarely affect drivability. Exceptions: exterior lighting and wipers in bad weather, and central locking faults that can leave the car unsecured.

How to diagnose with an OBD scanner

Read the code and freeze frame Connect an OBD2 scanner, confirm B1982 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many B0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the body electrical system for damage, corrosion, chafing or poor contact.
Subsystem check Operate the affected function while watching its switch and motor PIDs in live data.
Subsystem check Inspect connectors and wiring at flex points (door jambs, tailgate hinges) — wires break there first.
Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm B1982 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for B1982 (parts and labor, USD, independent shop rates): Replace the switch or actuator: $120–$450; Repair wiring or connectors: $80–$250; BCM repair or replacement: $300–$900. Overall, fixing B1982 usually costs between $80 and $900. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

How much does it cost to fix B1982?

Replace the switch or actuator — $120–$450; Repair wiring or connectors — $80–$250; BCM repair or replacement — $300–$900. Exact cost depends on the root cause, your vehicle and local labor rates — a proper diagnosis is the cheapest first step.

How do I diagnose B1982 myself?

Start with a scan: confirm B1982, save the freeze frame and note any companion codes. Then inspect the wiring and connectors related to the body electrical system, and verify the suspect component against live data before buying parts.

What are the symptoms of B1982?

Drivers most often notice: the affected function (locks, windows, lighting, wipers) works intermittently or not at all, no impact on engine operation in most cases, warning light on the dashboard.

What is the most common cause of B1982?

The most common causes are: faulty switch, motor or actuator of the affected system, corroded or loose connectors, body control module (BCM) fault.

What does OBD2 code B1982 mean?

B1982 — B1982 — Device Power Circuit High: Causes, Symptoms & Fix

The engine control module logs B1982 when it detects that a power circuit in the body electrical system is reading higher than expected. This code lives in the B-series family, which covers body-related faults — things like power windows, door locks, interior lighting, and wiper motors. When the module sees a voltage condition that stays outside normal range for that circuit, it flags B1982 and illuminates the check-engine light.

The body control module, or BCM, acts as the hub for most of these auxiliary circuits. It monitors switches, actuators, and motors throughout the vehicle and reports back to the PCM. The PCM doesn't set B1982 from a single bad reading — it waits for the fault to repeat under specific conditions before confirming the code. That's why the freeze frame data stored alongside B1982 matters so much: it captures engine load, RPM, coolant temperature, and vehicle speed at the exact moment the problem occurred. Reproducing those conditions during diagnosis makes isolating the root cause much faster.

Understanding why the module flags this code helps you approach the repair logically rather than guessing. The underlying issue could be as simple as a corroded connector or as involved as a failing BCM, so working through the most common culprits first saves time and money.

Common Symptoms of B1982

The symptoms point directly to whatever circuit is affected, since B1982 doesn't describe a specific component — it describes a voltage condition.

The affected function operates intermittently or stops working entirely; this could involve power locks, windows, lighting, or wiper motors
The check-engine or warning light stays illuminated on the dashboard
In most vehicles, engine performance and drivability remain unaffected
You may notice certain accessories behaving erratically — locks cycling on their own, windows responding slowly, or interior lights flickering
The fault may only appear under specific conditions, such as when the weather is wet or when doors are opened and closed repeatedly

What Triggers Code B1982

The most likely culprits are the everyday failure points in any vehicle's body electrical system. These rank from simplest to most involved, so check them in order.

A faulty switch, motor, or actuator within the affected circuit — the most common trigger
A body control module that has developed an internal fault or is receiving incorrect sensor data
A blown fuse or failed relay feeding power to the circuit
Wiring damage in high-flex areas like door jambs, tailgate hinges, or undercarriage passages
Corroded, damaged, or loosely seated electrical connectors that interrupt proper current flow

How to Diagnose B1982

A systematic approach keeps you from replacing parts unnecessarily. Follow these steps in order and document your findings at each stage.

Connect an OBD2 scanner, verify that B1982 is stored in the system, and record all freeze frame data — note engine load, RPM, coolant temperature, and vehicle speed when the fault was logged.
Look for related diagnostic trouble codes that may point to the root cause. Also search for manufacturer TSBs for your specific make and model using your VIN on the manufacturer website or nhtsa.gov — some B-series codes have known factory fixes or software updates.
Visually inspect all wiring and connectors tied to the body electrical system, focusing on areas exposed to moisture, road salt, or physical movement. Look for frayed insulation, broken strands, and green or white corrosion buildup.
Use the scanner to monitor live data for the affected circuit's switch and motor PIDs while operating the system manually.
Pay close attention to flex points where wires pass through door jambs and hinge areas — these spots experience the most wear and break first.
Clear the code, drive the vehicle through a complete drive cycle that recreates the freeze frame conditions, and verify that B1982 does not return.

Repair Options and Costs

Costs vary widely depending on which component is actually at fault. Start with the least expensive possibilities before moving to major replacements.

Repair or replace damaged wiring and connectors: $80–$250
Replace the faulty switch, motor, or actuator: $120–$450
BCM repair or replacement: $300–$900

Total repair cost for B1982 typically falls between $80 and $900. An accurate diagnosis before purchasing parts makes a significant difference — the most expensive scenario is rarely the one you encounter first, and most issues trace back to connectors or switches rather than the module itself.

Driving Safety Verdict

In most cases, B1982 poses no direct safety risk and the vehicle remains driveable. Body electrical faults typically do not affect engine operation, throttle response, or braking systems. That said, certain failures warrant attention: if the code involves exterior lighting, your visibility suffers at night or in poor weather; if central locking is affected, the vehicle may not secure properly. Use your best judgment based on which system is affected.