How to fix P0300 and P0304 error codes for Hyundai Accent 2009 ?

Question

Make: Hyundai


Model: Accent


Engine: 1.6L


Year: 2009


Error codes: P0300,P0304


Knowledge level: I know little about cars


Help needed: Please help me find out what is going on and how to fix it.

Answer 1

Hi there,

These codes are usually the result of a bad ignition coil. Sometimes you can spray some water on the coils and plug wires with the engine running and the misfire will get worse. You may also see sparks arcing, this also mean they need to be replaced