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Master
1,959 Answers
- Posted on Apr 03, 2012
Re: What dose code P0300 mean on a 99 Yukon
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
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