Seat Front Vertical Motor Memory Position Out of Range
Your car's front seat vertical motor has lost track of where it should be positioned, like a garage door opener forgetting how far up or down the door goes. The seat's memory position system can't calibrate properly because the motor position sensor data is outside expected limits.
The ECU monitors the seat vertical motor's position through a potentiometer or encoder feedback signal. During initialization and each adjustment cycle, it verifies the motor reaches expected position endpoints and stays within calibrated voltage/resistance thresholds. If feedback falls outside these parameters, the memory position becomes unreliable.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Motor Position Voltage | 0.5V - 4.5V (full range) | Below 0.5V or above 4.5V continuously |
| Position Memory Offset | ±5% of maximum travel | Greater than ±5% deviation from stored position |
Code B2161 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, B2161 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.