# diagnostic codes

**URL:** <https://forums.speedlife.net/t/diagnostic-codes/174671>\
**Category:** PittSpeed Automotive\
**Created:** [May 31, 2005, 8:10pm UTC](https://forums.speedlife.net/t/diagnostic-codes/174671 "2005-05-31T20:10:34Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![orangecrushgsx](https://avatars.discourse-cdn.com/v4/letter/o/9de053/32.png) [@orangecrushgsx](https://forums.speedlife.net/u/orangecrushgsx)\
**Post date:** [May 31, 2005, 8:10pm UTC](https://forums.speedlife.net/t/diagnostic-codes/174671/1 "2005-05-31T20:10:34Z")

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my buddy’s check engine light will not turn off in he vw passat. he has been driving it for a while now and its running absolutely fine! i found places on the net i can find the code and what the code means…this is what it says it means  
_Secondary Air Injection System Incorrect Flow_  
BUT whats that mean? anyone know where i can find the meanings for these codes?

thanks alot

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**Author:** ![Converted2LSX](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/converted2lsx/32/5962_2.png) [@Converted2LSX](https://forums.speedlife.net/u/Converted2LSX)\
**Post date:** [May 31, 2005, 8:17pm UTC](https://forums.speedlife.net/t/diagnostic-codes/174671/2 "2005-05-31T20:17:56Z")

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The secondary air injection is the system that injects air in to the exhaust manifolds when the engine is cold in order to help burning not burned gas to reduce emissions and warm catalitic converters sooner to get them work faster.

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**Author:** ![orangecrushgsx](https://avatars.discourse-cdn.com/v4/letter/o/9de053/32.png) [@orangecrushgsx](https://forums.speedlife.net/u/orangecrushgsx)\
**Post date:** [May 31, 2005, 8:22pm UTC](https://forums.speedlife.net/t/diagnostic-codes/174671/3 "2005-05-31T20:22:01Z")

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so what needs to be done to fix the problem?

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**Author:** ![imported\_gearhead](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/imported_gearhead/32/5957_2.png) [@imported\_gearhead](https://forums.speedlife.net/u/imported_gearhead)\
**Post date:** [June 1, 2005, 6:16am UTC](https://forums.speedlife.net/t/diagnostic-codes/174671/4 "2005-06-01T06:16:56Z")

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its bad and needs replaced? :dunno: