Servo Motor Foot Circuit Failure
The servo motor that controls the accelerator pedal position has an electrical circuit problem, similar to a broken wire in a remote control that won't respond to your commands. The engine control unit can't properly read or control the throttle position.
The ECU monitors the servo motor's voltage supply, ground continuity, and motor current draw to verify proper throttle control operation. It detects open circuits, short circuits, or resistance faults in the servo motor wiring and control signal pathways.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Servo Motor Supply Voltage | 11-14.5V | Below 9V or above 16V |
| Motor Coil Resistance | 5-15 ohms | Open circuit (infinite) or short (below 2 ohms) |
Code B1264 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, B1264 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.