# Help I can't figure out what this code means

**URL:** <https://community.cartalk.com/t/help-i-cant-figure-out-what-this-code-means/24588>\
**Category:** Maintenance/Repairs\
**Created:** [January 8, 2009, 4:09pm UTC](https://community.cartalk.com/t/help-i-cant-figure-out-what-this-code-means/24588 "2009-01-08T16:09:33Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Chrisraceing](https://avatars.discourse-cdn.com/v4/letter/c/439d5e/32.png) [@Chrisraceing](https://community.cartalk.com/u/Chrisraceing)\
**Post date:** [January 8, 2009, 4:09pm UTC](https://community.cartalk.com/t/help-i-cant-figure-out-what-this-code-means/24588/1 "2009-01-08T16:09:33Z")

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The code is p1399 and it’s for a 2000 Honda accord if anybody out there can help me figure out what this code means before I go to the Honda dealership it would be greatly appreciated.

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**Author:** ![rockford](https://avatars.discourse-cdn.com/v4/letter/r/ac8455/32.png) [@rockford](https://community.cartalk.com/u/rockford)\
**Post date:** [January 8, 2009, 5:05pm UTC](https://community.cartalk.com/t/help-i-cant-figure-out-what-this-code-means/24588/2 "2009-01-08T17:05:00Z")

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Random misfire.

Google is your friend 🙂

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**Author:** ![Chrisraceing](https://avatars.discourse-cdn.com/v4/letter/c/439d5e/32.png) [@Chrisraceing](https://community.cartalk.com/u/Chrisraceing)\
**Post date:** [January 8, 2009, 6:46pm UTC](https://community.cartalk.com/t/help-i-cant-figure-out-what-this-code-means/24588/3 "2009-01-08T18:46:47Z")

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I thought 300 was ramdom missfire

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**Author:** ![cigroller](https://avatars.discourse-cdn.com/v4/letter/c/c68b51/32.png) [@cigroller](https://community.cartalk.com/u/cigroller)\
**Post date:** [January 8, 2009, 7:42pm UTC](https://community.cartalk.com/t/help-i-cant-figure-out-what-this-code-means/24588/4 "2009-01-08T19:42:16Z")

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google it for a while - Honda apparently has this extra mysterious random misfire code that apparently doesn’t even show up on a lot of ODBII code lists. i also saw some reference to it pointing to the EGR valve

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**Author:** ![Chrisraceing](https://avatars.discourse-cdn.com/v4/letter/c/439d5e/32.png) [@Chrisraceing](https://community.cartalk.com/u/Chrisraceing)\
**Post date:** [January 8, 2009, 7:47pm UTC](https://community.cartalk.com/t/help-i-cant-figure-out-what-this-code-means/24588/5 "2009-01-08T19:47:54Z")

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I just changed the egr a week ago

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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:** [January 8, 2009, 8:40pm UTC](https://community.cartalk.com/t/help-i-cant-figure-out-what-this-code-means/24588/6 "2009-01-08T20:40:46Z")

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The DTC P1399 is for: “Random or/and multiple cylinder misfire detected”. DTC P0300 is for: “Random [cylinder] misfire detected.” Note the difference.  
There are other, and less expensive, mechanics available than at the dealers. Oh, well.