Seat Driver Front Up/Down Motor Stalled
The driver's seat up/down motor has stopped responding or is drawing too much current, like an elevator motor that suddenly jams and won't budge. The seat control module detected the motor isn't moving when it should be or is stuck under excessive load.
The seat control module monitors motor current draw and movement feedback through limit switches or potentiometers. When the motor stalls, current spikes above threshold or the seat position doesn't change within expected time. The ECU detects this mismatch and sets the fault.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Motor Current Draw | 0.5-3A during movement | >5A sustained (stall condition) |
| Seat Position Change | Position updates within 2-3 seconds of button press | No position change after 4+ seconds at full current |
Code B1663 is a low-severity fault. Your vehicle is generally safe to drive to a workshop for diagnosis. However, do not ignore it indefinitely — low-severity codes often indicate developing problems that become expensive if neglected. Book a diagnostic appointment within 2–4 weeks. If you notice any additional symptoms (rough running, power loss, unusual smells), treat it as higher priority.
Once the fault is repaired, B1663 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.