OBD-II Generic Error Code P0284: How to Fix It – Cylinder 8 Contribution Fault

Q: Can I still drive my car with code P0284?

You can drive short distances, but it's not recommended. The engine may run rough, consume more fuel, and cause damage to the catalytic converter over time. Fix the issue as soon as possible.

Q: Will a bad spark plug cause P0284?

Yes, a fouled or worn spark plug can cause cylinder 8 to misfire and not contribute power, triggering P0284.

Q: How much does it cost to fix code P0284?

Cost varies: a spark plug can cost $5-20, ignition coil $50-150, fuel injector $50-200. Labor adds $100-200 if done by a mechanic. For internal engine issues, repairs can exceed $1000.

Q: Do I need to clear the code after repairs?

Yes, use an OBD-II scanner to clear the code after repairs. If the code returns, the issue was not fully resolved.

Q: What does 'contribution fault' mean?

It means the engine's computer detected that cylinder 8 is not producing as much power as expected, often due to a misfire or fuel delivery problem.

Abstract

Error code P0284 means the engine's computer has detected that cylinder 8 is not contributing its fair share of power. This can be caused by a faulty fuel injector, spark plug, ignition coil, or a mechanical issue inside the cylinder. It's a medium-severity code that can lead to rough running and reduced fuel economy if ignored.