Shift Solenoid E Stuck On
The transmission's Shift Solenoid E is electrically stuck in the "on" position, preventing it from controlling fluid pressure properly. Think of it like a water valve that won't close—fluid keeps flowing even when it shouldn't.
The ECM monitors solenoid E's duty cycle, current draw, and response time during shift commands. It detects when the solenoid fails to de-energize or maintains constant electrical activation when it should cycle on and off. The ECU compares actual solenoid behavior against expected timing and resistance patterns.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Solenoid Duty Cycle Response | 0-100% cycling as commanded | Remains at 100% or fails to respond to ECU commands |
| Solenoid Current Draw | 0.5-2.5 amps (varies by design) | Continuous current draw without cycling or circuit resistance abnormality |
Code P0776 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, P0776 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.