Power Window RR Motor Circuit Open
The rear right power window motor circuit has lost electrical connection, like a broken wire in a lamp cord. The vehicle's computer detected no signal when trying to operate the window.
The body control module monitors current draw and voltage feedback from the rear right window motor circuit during operation. When commanded to move, it expects to detect motor current within a specific range; an open circuit results in zero current and voltage dropout.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Motor Circuit Current | 2-15 amps during operation | 0 amps or no change detected |
| Circuit Voltage | 12V supply available | Voltage drop below 10V or no continuity |
Code B1423 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, B1423 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.