Seat Driver Front Up Circuit Short To Ground
The seat's front up motor circuit is shorted to ground, meaning electricity is taking an unintended shortcut instead of flowing properly through the motor. It's like water leaking out of a pipe instead of flowing through the faucet.
The ECU monitors the voltage and current draw on the driver seat's up motor circuit. When a short to ground occurs, current spikes dramatically and voltage drops to near zero, triggering a fault code. The control module expects normal resistance and load during seat movement.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Circuit Voltage | 11-14V during operation | <2V sustained or continuous |
| Circuit Current Draw | 2-8A during seat movement | >15A spike or continuous high draw |
Code B1662 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, B1662 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.