Column Reach Feedback Potentiometer Circuit Short to Ground
The steering column reach adjustment motor's position sensor is sending a constant ground signal instead of varying voltage, like a light switch stuck in the 'on' position. The ECU can't tell where the steering wheel is positioned.
The ECU monitors the potentiometer voltage signal from the reach feedback sensor as it moves between fully retracted and extended positions. It expects a variable voltage between approximately 0.5V and 4.5V. A short to ground pulls voltage below 0.2V continuously, preventing the ECU from calculating proper motor position.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Potentiometer voltage | 0.5V to 4.5V (varies with position) | Below 0.2V (shorted to ground) |
| Sensor resistance | 1kΩ to 100kΩ (variable) | Near 0Ω (short to ground) |
Code B2331 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, B2331 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.