P0300

WarningGeneral

What This Code Means

Engine misfiring; Rough idle

Possible Causes

  • •Vacuum leak
  • •Faulty spark plug

Suggested Actions

  1. 1Replace spark plugs
  2. 2Inspect and repair vacuum lines

ASK RUDY ABOUT THIS FAULT

Get a diagnosis walkthrough for P0300 on your specific Rehlko unit — cited to the OEM manual, not a forum guess.

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