B1719 — Seat Driver Forward Switch Circuit Short To Battery

OBD2 code B1719 flags a problem with the body electrical system (seat driver forward switch circuit short to battery). The car is usually drivable while you plan the repair. Common culprits: body control module (BCM) fault, damaged wiring in door jambs or wet areas, blown fuse or failed relay.

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 B1719 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 B1719 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for B1719 (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 B1719 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 B1719?

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

Will B1719 clear itself?

Sometimes B1719 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.

How much does it cost to fix B1719?

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.

How do I diagnose B1719 myself?

Start with a scan: confirm B1719, 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 does OBD2 code B1719 mean?

When your scan tool pulls code B1719, the vehicle's body control module has detected that a specific electrical circuit is behaving incorrectly. B1719 stands for "Seat Driver Forward Switch Circuit Short To Battery," which tells you the problem lives in the seat adjustment system—specifically, the forward movement switch on the driver's side has shorted to battery voltage. This is classified as a body electrical fault, which means the engine and transmission are unaffected.

Modern vehicles rely on the body control module to monitor dozens of switches, motors, and actuators throughout the cabin. The module constantly compares actual circuit behavior against factory specifications. When it encounters voltage on a circuit where it expects to see ground—or vice versa—it recognizes that something has gone wrong. For B1719 to illuminate your check engine light, the module must witness the anomalous condition repeatedly under specific operating circumstances. A single glitch typically gets ignored; a persistent fault triggers the warning.

This is where freeze frame data becomes your best friend. The control unit records the exact engine conditions when B1719 was stored—load percentage, RPM, coolant temperature, vehicle speed. Those numbers are a blueprint for recreating the failure. If the code appeared while accelerating at 3,500 RPM with 40% engine load, you should reproduce those conditions during your diagnostic drive.

Symptoms of B1719

The check engine or service vehicle light appears on the instrument cluster
The driver's seat fails to move forward, moves intermittently, or operates only in one direction
You may hear clicking, grinding, or buzzing from under the seat when activating the switch
Other body functions—windows, door locks, or interior lighting—can behave erratically since the BCM monitors multiple circuits
Engine performance remains completely normal; B1719 has no impact on acceleration, shifting, or fuel economy
The seat may work normally for days, then fail again—a hallmark of intermittent electrical problems

Common causes of B1719

Corroded or loose electrical connectors at the seat switch, seat motor, or body control module — the most frequent culprit behind this code
Worn or failed seat forward switch on the driver's side door panel or seat cushion
Damaged wiring in high-flex areas such as seat tracks, door jambs, or beneath the carpet where wires bend repeatedly
Faulty seat adjustment motor that draws excessive current and confuses the BCM's circuit monitoring
Body control module internal failure — less common but possible, especially in high-mileage vehicles
Blown fuse or failed relay supplying the seat adjustment circuit — always check the simplest possibilities first
Moisture intrusion in wiring connectors, common in vehicles exposed to rain, car washes, or flooding

How to diagnose B1719

Connect your OBD2 scanner and confirm B1719 is present. Save the freeze frame data immediately—that snapshot tells you exactly what conditions triggered the code, and you need to replicate those conditions during testing.
Scan for additional diagnostic trouble codes. Body electrical problems often generate multiple codes simultaneously. If your scanner shows related codes in the B0xxx range, address those first—sometimes they point directly to the root cause rather than a downstream symptom.
Visually inspect the seat adjustment switch and surrounding wiring. Look for cracked insulation, corroded terminals, loose plugs, and any signs of moisture or water damage. Pay special attention to the connector where the seat wiring harness meets the seat frame—this junction flexes constantly and commonly fails.
Test the switch and motor using a multimeter. With the connector unplugged, check switch resistance in both positions and verify that the motor shows appropriate continuity. A short to battery voltage on the signal line indicates either a failed switch or wiring that has rubbed through to a constant power source.
Examine wiring at flex points throughout the seat track and door jamb. Wires break internally while the outer insulation appears intact. Gently flex the harness while monitoring resistance or voltage with your multimeter to expose intermittent opens.
Clear the code and perform a complete drive cycle, deliberately including the conditions from the freeze frame data. If B1719 returns, you have confirmed an active fault. If it stays cleared, the problem was likely transient.

Repair options and costs for B1719

The right fix depends entirely on which component triggered the fault. Here are the typical repair scenarios with parts and labor:

Seat forward switch replacement: $120–$450. Labor time is minimal since the switch is usually accessible on the door panel or seat side.
Seat adjustment motor replacement: $150–$500. More labor-intensive than a switch, as motor access often requires seat removal.
Body control module repair or replacement: $300–$900. BCM costs vary widely by manufacturer. Some modules can be repaired or reprogrammed; others require full replacement.
Wiring harness repair or connector replacement: $80–$250. Wiring repairs in accessible areas are straightforward; harness replacement under the carpet takes considerably longer.

Overall, you should budget between $80 and $900 to resolve B1719. The exact figure hinges on your vehicle and what the technician finds. Always demand a confirmed diagnosis before approving any parts replacement—the cheapest fix is almost never the first one a shop will quote.

Can you drive with B1719?

Yes, B1719 is classified as a short-severity code. The seat adjustment system has no bearing on engine operation, braking, or steering, so your vehicle remains mechanically sound. You can continue driving without concern for drivetrain damage.

That said, there are practical considerations. If the driver's seat is stuck in an uncomfortable or unsafe position, get it fixed before a long trip. Some vehicles tie seat position memory to other systems, and an unresponsive switch might prevent proper airbag seat occupancy detection. Use your judgment—drive short distances to a repair shop if needed, but don't ignore the code indefinitely.