Seat Front Up/Down Potentiometer Feedback Circuit Failure
The seat's up/down position sensor isn't sending a clear signal back to the car's computer, like a volume knob that's dirty and won't give accurate readings. The ECU can't verify where the seat actually is in its travel range.
The ECU monitors the analog voltage output from the seat's potentiometer as it moves up and down, expecting a smooth voltage sweep corresponding to seat position. When voltage is out of range, erratic, or absent, the ECU triggers this fault. The system typically uses a 0-5V signal that should vary linearly with seat travel.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Potentiometer Output Voltage | 0.5V to 4.5V (linear progression with seat movement) | Below 0.5V, above 4.5V, or no signal detected |
| Signal Rate of Change | Smooth continuous voltage sweep during movement | Abrupt jumps, flatline, or erratic fluctuations |
Code B1954 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, B1954 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.