Seat Driver Rear Up/Down Motor Stalled
The driver's rear seat up/down motor has stopped responding to commands, similar to a car window motor that won't move even when you press the button. The seat control module detected the motor is stuck or not operating within normal electrical parameters.
The seat control module monitors motor current draw and movement feedback during up/down commands. It expects to see rising current when the motor engages and detects a stall condition when current stays high without corresponding seat position change or the motor draws excessive amperage indicating jamming.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Motor Current Draw | 2-5 amps during operation | >8 amps or continuous high current without movement |
| Motor Response Time | Seat position changes within 500ms of command | No position change detected after 1+ second |
Code B1664 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, B1664 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.