B1764 — Seat Driver Front Down Circuit Short To Ground

OBD2 code B1764 flags a problem with the body electrical system (seat driver front down circuit short to ground). 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 B1764 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 B1764 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for B1764 (parts and labor, USD, independent shop rates): Repair wiring or connectors: $80–$250; BCM repair or replacement: $300–$900; Replace the switch or actuator: $120–$450. Overall, fixing B1764 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 is the most common cause of B1764?

The most common causes are: body control module (BCM) fault, damaged wiring in door jambs or wet areas, blown fuse or failed relay.

How do I diagnose B1764 myself?

Start with a scan: confirm B1764, 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.

How much does it cost to fix B1764?

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

What does OBD2 code B1764 mean?

Is it safe to drive with B1764?

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 engine control module logs code B1764 when it detects an abnormal condition in the driver's seat forward-adjustment circuit. Specifically, the module identifies a short to ground somewhere in the wiring or components that move the seat forward and backward. This diagnostic trouble code falls under the body electrical category, which covers comfort and convenience systems rather than engine management.

When B1764 triggers, the control module has compared live sensor and switch inputs against factory-defined acceptable ranges over multiple drive cycles and found a discrepancy. The system then captures a freeze frame snapshot — recording engine speed, load, coolant temperature, and vehicle speed at the exact moment the fault occurred. Reviewing this data first often points directly at the root cause, saving significant diagnostic effort.

Most body electrical codes like B1764 do not affect engine performance or drivability. The seat adjustment motor and its control circuit operate independently from the powertrain. However, a malfunctioning seat motor can leave you unable to find a comfortable driving position, and if the fault involves other systems sharing the same circuit, additional symptoms may appear.

Common Symptoms of B1764

The driver's seat fails to move forward or backward, or moves only intermittently
Dashboard warning indicator illuminates related to body systems
Adjacent functions on the same circuit (such as power lumbar or seat memory) may also behave erratically
The seat motor may emit a clicking sound without producing movement
No effect on engine performance, transmission operation, or braking systems

What Causes B1764?

Corrosion or looseness at electrical connectors serving the seat motor circuit
Broken or chafed wiring insulation, especially in areas exposed to moisture or flexing
Failed seat adjustment motor or actuator motor
Faulty seat position switch or related control switch
Body control module (BCM) internal malfunction
Blown fuse or failed relay supplying power to the seat motor circuit

How to Diagnose B1764

Connect an OBD2 scanner and retrieve B1764 along with any other stored codes. Save the freeze frame data immediately — this record shows operating conditions when the failure happened.
Research technical service bulletins for your specific make and model using your VIN. Many B0xxx codes have published factory fixes, software updates, or known issues documented by the manufacturer.
Perform a visual inspection of all wiring and connectors associated with the seat adjustment motor. Pay close attention to harness routing through door sills and under the seat where wires flex and moisture collects.
Test the seat motor's power and ground circuits with a multimeter while someone operates the switch. No voltage or high resistance indicates a wiring problem; normal voltage with no movement points to a failed motor.
Inspect connectors at both the motor and the BCM for bent pins, corrosion buildup, or loose fits that could interrupt proper circuit operation.
Clear the code and complete a drive cycle that reproduces the freeze frame conditions (same speed, load, and temperature). If B1764 returns, the fault is confirmed and present.

Repair Options and Costs for B1764

Address the most likely culprits before spending money on expensive components:

Wiring repair or connector replacement: $80–$250
Body control module repair or replacement: $300–$900
Seat adjustment switch or motor replacement: $120–$450

Total Repair Cost Summary

Your actual expense depends entirely on which part failed. For B1764, expect to pay between $80 and $900 depending on diagnosis. Most cases involve wiring issues or faulty switches at the lower end of that range. BCM replacement represents the most expensive scenario and should only be pursued after confirming the module itself is defective. Always verify component-level faults with multimeter testing before purchasing replacements.

Can You Drive with B1764?

B1764 carries a low severity rating for most vehicles. The seat adjustment circuit does not interact with safety-critical systems like steering or brakes. You can continue driving, though a stuck seat position may create discomfort or limit your visibility. If the code affects other circuits through a shared BCM or fuse, those related systems (such as exterior lighting or wipers) could also malfunction, which may require prompt attention depending on conditions.