code p0300?

1999 BUICK PARK AVENUE
69,000 MILES • 6 CYL • FWD • AUTOMATIC
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LBRUNO01
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When having a computer check done we get a code p0300. The service engine soon light came on and the car started to run rough.

Please help
Lisa
Nov 28, 2008 at 2:40 AM
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SQM
  • ✓Experienced Mechanic
  • 6,383 POSTS
Hello,

The P0300 code is for random misfire code. It is basically telling you that the spark plugs are not providing adequate spark to the engine.

https://www.2carpros.com/articles/check-engine-light-is-it-safe-to-drive

A lot of times a random misfire can cause due to having old spark plugs. Take out the plugs and do a visual inspection for excessive carbon build up. If the plugs looks to be dirty changing out the plugs can fix the issue.

Changing the spark plugs can be done using basic hand tools.

https://youtu.be/UKB-ytgbnzU

https://www.2carpros.com/articles/how-to-tune-up-a-car-engine

I have attached diagrams for your reference.

Please let me know of any questions.

Thank you.
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Aug 23, 2021 at 3:12 PM
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