B1381 — Oil Change Reset Button Circuit Open

Will B1381 clear itself?

Sometimes B1381 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

What is the most common cause of B1381?

The most common causes are: blown fuse or failed relay, faulty switch, motor or actuator of the affected system, corroded or loose connectors.

What are the symptoms of B1381?

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

How much does it cost to fix B1381?

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

Is it safe to drive with B1381?

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.

The Oil Change Reset Button Circuit Open fault code B1381 is a body electrical issue stored by your vehicle's onboard computer when it detects an interruption in the circuit that powers the oil change reset button. This falls under the B-series codes, which cover body-related electrical problems rather than engine or powertrain faults. When your car's body control module checks this circuit and finds that electrical current cannot complete its intended path, it logs B1381 after confirming the condition across multiple drive cycles to rule out temporary glitches.

"Circuit open" is technician shorthand for a broken electrical path. In practical terms, this means somewhere between the module and the oil change reset button, continuity has been lost. The break could be in the wiring itself, at a connector that has become unplugged or corroded, inside a faulty component, or at a blown fuse. The body control module expects to see a specific voltage or resistance reading at this circuit, and when measurements fall outside acceptable parameters, the system registers the fault and illuminates the warning light.

When B1381 sets, the module saves freeze frame data alongside the code. This snapshot captures engine RPM, load, temperature, and vehicle speed at the exact moment the fault occurred. Technicians use this information to recreate the driving conditions that triggered the code, making diagnosis more targeted and efficient. Without this context, diagnosing intermittent electrical problems would be significantly more challenging.

Symptoms of B1381

• Check engine or body warning light illuminates on the instrument cluster
• The oil change reset function becomes unresponsive or stops working entirely
• Other body electrical functions may operate erratically or intermittently, including power locks, windows, lighting, or wipers
• In most cases, engine performance remains unaffected since B1381 does not involve powertrain systems
• The oil change indicator may remain stuck on or fail to reset after an oil change

Common Causes

• Internally open or failed oil change reset button or switch
• Blown fuse providing power to the circuit
• Connector that is unplugged, has a backed-out terminal pin, or shows signs of corrosion or water intrusion
• Broken or frayed wire within the oil change reset button harness
• Failed relay feeding the affected circuit
• Wiring damage in high-flex areas such as door jambs, tailgate hinges, or areas exposed to moisture
• Faulty switch, motor, or actuator in the associated body system
• Body control module malfunction that prevents proper circuit monitoring
• Loose or corroded ground connection affecting the circuit

How to Diagnose B1381

1. Connect an OBD2 scanner to the vehicle's diagnostic port and retrieve B1381 along with any other stored codes. Record the freeze frame data, which reveals engine conditions at the moment the fault was detected.

2. Investigate any related or companion codes, as these often point to the underlying cause. Check manufacturer technical service bulletins for your specific make and model—many body electrical codes have documented factory fixes or software updates available through the manufacturer website or NHTSA database.

3. Perform a thorough visual inspection of the wiring harness and connectors tied to the body electrical system. Look for damaged insulation, chafing from contact with other components, corrosion buildup, and loose or improperly seated terminals.

4. Use a multimeter to conduct continuity testing on the oil change reset button circuit from end to end. Gently wiggle the harness during testing to identify intermittent opens that only appear under vibration or movement.

5. Access live data streams and monitor switch and motor operation parameters while actively operating the affected function. Compare readings against specifications to identify abnormal behavior.

6. Pay close attention to wiring at flex points and entry points where harnesses pass through body openings. Door jambs and hinge areas experience repeated bending and are common failure points.

7. Clear the code and complete a full drive cycle that includes the conditions recorded in the freeze frame data. Verify that B1381 does not reappear, confirming the repair was successful.

Repair Options

• Replace the faulty switch, button, or associated actuator: $120–$450
• Body control module repair or complete replacement: $300–$900
• Wiring repair or connector replacement: $80–$250

Cost Breakdown

The total repair cost for B1381 varies considerably depending on which component has failed. If the issue stems from a simple connector or minor wiring repair, expect costs in the $80–$250 range. Replacing a failed switch or actuator typically runs $120–$450 including parts and labor. The most expensive scenario involves body control module replacement at $300–$900, though this is less common. An accurate diagnosis before purchasing parts always saves money—the costliest repair is rarely the first place to look.

Can You Drive with B1381?

In most vehicles, B1381 does not prevent driving. Body electrical codes typically do not affect engine operation, drivability, or safety systems. However, exercise caution if the fault involves exterior lighting, wipers during inclement weather, or central locking that could leave the vehicle unsecured. Address the underlying issue at your earliest convenience to restore full functionality.