Having problems with your 1999 GMC Yukon ?

What dose code P0300 mean on a 99 Yukon - 1999 GMC Yukon

Posted / edited by AnonymousUser on : 23-05-2022

Answers :

P0300 is indicating a random/multiple cylinder misfire.
The following are possible causes for this problem: (courtesy of obd-codes.com)
  • Faulty spark plugs or wires
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector(s)
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Stuck/blocked EGR valve / passages
  • Faulty camshaft position sensor
  • Defective computer
Repair Help & Product Troubleshooting for 1999 GMC Yukon

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