Cylinder 7 Contribution/Balance Fault
Cylinder 7 isn't pulling its weight compared to the other cylinders—like one musician playing quieter than the rest in an orchestra. The engine's computer detected that this cylinder isn't contributing equally power or fuel burn.
The ECU monitors cylinder contribution through fuel trim adjustments and ignition timing feedback. It compares each cylinder's combustion efficiency by analyzing oxygen sensor data and knock sensor signals. When cylinder 7 deviates significantly from the mean, a fault is triggered.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Cylinder Contribution Balance | Within 5% of mean across all cylinders | Greater than 10% deviation from mean |
| Fuel Trim Compensation | ±10% adaptive trim | Exceeds ±15-20% correction limit |
Code P0282 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, P0282 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.