Seat Driver Front Up Circuit Failure
The seat's front up motor circuit is broken, like a light switch that won't turn on because the wire is disconnected. Your driver's seat won't move up, and the car's computer detected the electrical failure.
The ECU monitors voltage and current draw from the seat motor up circuit during activation commands. It detects open circuits, shorts, or motor resistance outside normal operating range.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Motor circuit voltage | 11-14V during operation | 0V or >14.5V indicates open/short circuit |
| Motor current draw | 2-8 amps under load | <0.5A or >10A signals motor failure or wiring fault |
Code B1659 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, B1659 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.