Gear Shift Reverse Actuator Circuit / Open [rearward motion, even gears, 2,4,6]
The transmission's reverse gear actuator circuit has an open (broken) electrical connection, like a light switch that won't turn on. Your vehicle likely can't engage reverse or shift properly through even gears (2, 4, 6).
The ECU monitors voltage and current through the reverse actuator solenoid circuit. It expects a complete circuit with normal resistance when the solenoid is commanded on. An open circuit causes the ECU to detect zero or very high resistance, triggering the fault code.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Solenoid Circuit Voltage | 12V present when actuator commanded | 0V or no voltage drop across solenoid |
| Solenoid Coil Resistance | 4-8 ohms | Infinite ohms (open circuit) |
Code P0924 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.
Once the fault is repaired, P0924 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.