Seat Rear Up/Down Potentiometer Feedback Circuit Short To Ground
The seat's up/down position sensor is sending a short-to-ground signal to the ECU, like a broken wire touching metal. The vehicle detects the electrical fault and triggers a warning light.
The ECU monitors the potentiometer's voltage feedback as the rear seat moves up and down. A healthy circuit returns variable voltage (typically 0.5V–4.5V). When shorted to ground, voltage drops below safe minimum threshold, triggering the fault code.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Potentiometer Output Voltage | 0.5V–4.5V (variable with seat position) | Below 0.2V or continuous ground short |
| Circuit Resistance | 10 kΩ–100 kΩ (varies with seat position) | Below 5 Ω (short to ground detected) |
Code B1953 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, B1953 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.