Ignition Coil - Cylinder 6 - Early Activation Fault
The ignition coil for cylinder 6 is firing too early, like a spark plug going off before the piston reaches the right position. This disrupts combustion timing and engine performance.
The ECU monitors the ignition coil's primary circuit activation timing relative to crankshaft position. It detects when the coil fires early by comparing actual spark timing against the expected map. Early activation occurs when voltage is applied to the coil before the optimal ignition advance angle.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Coil Primary Activation Timing | Within ±2-5° of target ignition advance | Activation occurs >5° earlier than commanded |
| Coil Dwell Time | 3-8 milliseconds before spark | Dwell initiated prematurely, causing early fire |
Code P1384 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, P1384 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.