B1867 — Battery Power Supply ECU Circuit Short To Ground

B1867 — Battery Power Supply ECU Circuit Short To Ground. A fault in the body electrical system. The car is usually drivable while you plan the repair. Typical causes: faulty switch, motor or actuator of the affected system, body control module (BCM) fault, damaged wiring in door jambs or wet areas.

body electrical

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 B1867 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 B1867 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for B1867 (parts and labor, USD, independent shop rates): Replace the switch or actuator: $120–$450; BCM repair or replacement: $300–$900; Repair wiring or connectors: $80–$250. Overall, fixing B1867 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

What are the symptoms of B1867?

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

How do I diagnose B1867 myself?

Start with a scan: confirm B1867, 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.

Is it safe to drive with B1867?

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.

What does OBD2 code B1867 mean?

What is the most common cause of B1867?

The most common causes are: faulty switch, motor or actuator of the affected system, body control module (BCM) fault, damaged wiring in door jambs or wet areas.

The body control module (BCM) continuously watches voltage levels across the circuits that power door locks, windows, interior and exterior lighting, windshield wipers, and other convenience features. When the module detects that battery power is leaking to ground through an unintended path instead of traveling through its designated circuit, it logs OBD2 code B1867 — Battery Power Supply ECU Circuit Short To Ground. A short to ground bypasses the normal current path and forces electricity toward the chassis, which the module interprets as a fault condition.

The PCM doesn't set B1867 on a single glitch. It requires the condition to appear consistently under specific operating conditions before illuminating the check engine light. The freeze frame data stored alongside the code records engine load, RPM, coolant temperature, and vehicle speed at the moment the fault was detected — use that snapshot to reproduce the exact circumstances during your diagnosis.

In most vehicles, this code sits squarely in the body electrical family. The engine, transmission, and drivetrain typically ignore it completely. What you notice instead depends entirely on which circuit is shorting — it might be your power locks, windows, dome light, or wipers acting up or going dark entirely.

Common Symptoms of B1867

The malfunctioning function — locks, windows, lighting, wipers, or another body feature — operates intermittently or stops working altogether
Dashboard warning light remains on after the fault is detected
No change to engine performance, RPM, or throttle response
BCM may log additional related codes as it monitors the affected circuit
Electrical draw on the battery can increase if the short is active while the vehicle is parked
Some vehicles may exhibit multiple body system failures if the BCM itself is faulty

What Causes B1867?

Corroded or loose electrical connectors, especially in areas exposed to moisture
Body control module internal failure or software corruption
Wiring insulation damage in door jambs, tailgate hinges, or other high-flex zones where wires bend repeatedly
Blown fuse or failed relay supplying the affected circuit
Faulty switch, motor, or actuator that has developed an internal short

How to Diagnose B1867

Connect an OBD2 scanner and confirm B1867 is stored. Save the freeze frame data immediately — it tells you engine load, RPM, coolant temperature, and speed at the moment the module detected the fault.
Pull all stored codes. Related codes often point toward the root cause rather than the symptom. Also search for manufacturer TSBs (technical service bulletins) for your specific make and model — many B0xxx body codes have published factory updates or software flashes.
Visually inspect the wiring harness and connectors tied to the body electrical system. Look for damaged insulation, copper turn green from corrosion, pins pushed back in their housings, or moisture residue.
Operate the affected function while monitoring live data on the scanner. Watch switch state and motor feedback PIDs to spot intermittent operation.
Pay close attention to flex points — door jambs, tailgate hinges, and sunroof rails. Wires break or chafe at these locations first because of constant movement.
Clear B1867, then drive the vehicle through a complete drive cycle that includes the conditions recorded in the freeze frame. If the code returns, you have confirmed an active fault rather than a one-time spike.

Repair Options

Tackle inexpensive possibilities before replacing expensive modules. The fix depends entirely on what caused the short:

Wiring and connector repair — $80–$250: Fix broken insulation, splice damaged wires, clean corrosion from terminals, or replace a single failed connector rather than an entire harness.
Switch or actuator replacement — $120–$450: If the component itself has an internal short, replacing the faulty part resolves the code with no further electrical work.
BCM repair or replacement — $300–$900: When the module itself is the culprit, you may need a repaired unit, a new module, or a factory reflash from the dealer.

How Much Does It Cost to Fix B1867?

At independent shop rates in the United States, expect to pay between $80 and $900 depending on which component failed. A wiring repair at the door jamb runs $80–$250, a faulty actuator or switch runs $120–$450, and a body control module replacement runs $300–$900 including programming if required. Getting an accurate diagnosis before buying parts always saves money — the cheapest repair is almost never the first one to assume.

Can You Drive with B1867?

Usually yes — body electrical codes rarely touch engine operation. Exercise judgment based on which system is affected. A failed interior light is a minor inconvenience. A central locking system stuck open, however, leaves your vehicle unsecured. Inoperable exterior lighting or wipers during rain, snow, or night driving creates a genuine safety hazard. Address those situations promptly regardless of what the engine is doing.