# P0300

**URL:** <https://community.cartalk.com/t/p0300/27942>\
**Category:** Maintenance/Repairs\
**Created:** [March 18, 2009, 10:26am UTC](https://community.cartalk.com/t/p0300/27942 "2009-03-18T10:26:46Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![trainguy5000](https://avatars.discourse-cdn.com/v4/letter/t/e99b99/32.png) [@trainguy5000](https://community.cartalk.com/u/trainguy5000)\
**Post date:** [March 18, 2009, 10:26am UTC](https://community.cartalk.com/t/p0300/27942/1 "2009-03-18T10:26:46Z")

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I have a 1996 Chevy Blazer that is showing this code. According to my scan tool it is cylinder number 6 misfire. I have replaced that plug and wire. What else could be setting this code?

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**Author:** ![hellokit](https://avatars.discourse-cdn.com/v4/letter/h/6a8cbe/32.png) [@hellokit](https://community.cartalk.com/u/hellokit)\
**Post date:** [March 18, 2009, 10:52am UTC](https://community.cartalk.com/t/p0300/27942/2 "2009-03-18T10:52:51Z")

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Back to the scan tool. P0300 is: “random misfire”. #6 cylinder misfire is coded P0306. You’re on the right track, but, the wrong cylinder.

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**Author:** ![Joseph\_E\_Meehan](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/joseph_e_meehan/32/21_2.png) [@Joseph\_E\_Meehan](https://community.cartalk.com/u/Joseph_E_Meehan)\
**Post date:** [March 18, 2009, 11:28am UTC](https://community.cartalk.com/t/p0300/27942/3 "2009-03-18T11:28:19Z")

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How old are the other plugs. Likely just time to replace them all. As Hello wrote, that code is not specific to any one plug.