Code P0300?

2010 CHEVROLET SILVERADO
200,000 MILES • 6.2L • V8 • 4WD • AUTOMATIC
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ANDREW ROSE
  • MEMBER
  • 1 POST
Code P0300, rough idle, slight tick/knock, missing and loss of power.
No engine light on and the problem occurred overnight.
Jun 20, 2023 at 2:54 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

Code P0300 is a random misfire code. This can be caused by several different things. It can be due to needing a tune-up, fuel pressure issues, a partially plugged catalytic converter, low engine compression, even an engine vacuum leak, and the list goes on.

Is this the only code present? If it is, let's start simple. First, check to see if there are any engine vacuum leaks.

Here is a link that explains how to check:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Let me know if you find any or if you have other questions.

Take care,

Joe
Jun 20, 2023 at 11:05 PM
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