B2382

Code

Generic B — Body

Driver seat position sensor circuit malfunction

Brand: Generic

Type: B — Body

Views: UK: 5 EN: 9 RU: 4

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Page language: EN

Causes

Open or shorted wiring between seat position sensor and control module
Poor connector mating, corrosion, or bent terminals under the seat
Failed seat position sensor (potentiometer/encoder)
Faulty seat control module or BCM input circuit
Physical damage or binding in seat track affecting sensor
Blown fuse or poor battery voltage to related circuits

Symptoms

Seat memory functions do not operate or are intermittent
Seat position displayed incorrectly in driver information
Airbag/occupant classification or seat belt reminder warning lamp may illuminate (depending on vehicle)
Diagnostic trouble code stored (B2382) and possible limp/limited features
Unusual resistance or noise when moving the seat

What to check

Read and record stored DTCs and freeze frame data with a scan tool
Check battery voltage (12 V nominal) and fuses related to seat circuits
Visually inspect connectors and wiring under the driver seat for damage, corrosion or pin push-out
Wiggle-test the harness and connectors while observing live data to see if the fault is intermittent
Verify seat moves freely and sensor mechanism is not mechanically obstructed

Signal parameters

Reference voltage to sensor: typically 5 V (±0.25 V) from the module — verify exact value for vehicle
Signal output: variable voltage dependent on seat position — commonly ~0.2–4.8 V across travel
Ground continuity: near 0 Ω between sensor ground and chassis ground
Potentiometer resistance full travel: typically several hundred ohms to several kiloohms (manufacturer specific)
No short to battery (12 V) or to ground on the signal line

Diagnostic algorithm

Scan for B2382 and any related codes; record freeze-frame/live data.
Turn ignition ON, monitor the seat position sensor live data (voltage/position). Move seat through full travel and observe for smooth, continuous changes without dropouts or jumps.
Visually inspect connectors at the seat and module. Disconnect and inspect terminals for corrosion, bent pins, or moisture. Re-engage connectors and check for improved signal.
Check reference voltage and ground at the sensor connector with a multimeter. If reference is missing, trace back to fuse, relay, or module supply.
Measure signal wire voltage while moving seat. Look for open/short (signal stuck at 0 V, 5 V, or battery voltage) or intermittent changes indicating a broken wire.
Perform continuity checks on suspect wiring between sensor and control module, especially where harness flexes at seat base. Repair any chafed or broken conductors.
If wiring and connectors are good but the signal is erratic or out of expected range, bench-test or replace the seat position sensor/potentiometer.
If sensor replacement does not clear the issue, test the receiving module input circuit or replace/repair the module per manufacturer procedures.
After repair, clear codes, perform relearn/programming if required (seat memory or occupant classification), then verify repair by cycling seat and rechecking for DTC return.

Likely causes

Damaged harness where it passes through the seat base or fold points
Corroded or disconnected connector at the seat position sensor
Worn or failed internal potentiometer in the seat position sensor
Intermittent ground or reference voltage to the sensor
Aftermarket equipment or seat removal/reinstallation disturbed wiring

Fault status

⚠️ Status

B2382 — Driver seat position sensor circuit malfunction: open/short/intermittent signal detected from the driver seat position sensor. Inspect sensor, wiring, connectors, and related modules.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours