Shift Solenoid D Control Circuit Range/Performance
The transmission's Shift Solenoid D isn't responding properly to commands from the engine computer. Think of it like a light switch that's stuck or not flipping when you flip it—the electrical signal is there, but the solenoid isn't moving fluid to shift gears correctly.
The ECM sends a PWM (pulse-width modulation) signal to Shift Solenoid D and monitors the feedback voltage and current draw through the control circuit. It expects the solenoid to respond with specific resistance and current values within defined time windows; if the actual response falls outside normal parameters, a fault is triggered.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Solenoid Current Draw | 0.5–2.0 amps during activation | Below 0.4A or above 2.5A, or no response |
| Circuit Voltage | 11–14V at solenoid connector | Below 10V or short/open circuit detected |
Code P0981 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, P0981 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.