# Check engine light is on

**URL:** <https://community.cartalk.com/t/check-engine-light-is-on/55128>\
**Category:** Maintenance/Repairs\
**Tags:** f350, ford\
**Created:** [September 14, 2010, 5:41pm UTC](https://community.cartalk.com/t/check-engine-light-is-on/55128 "2010-09-14T17:41:47Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![davidxray](https://avatars.discourse-cdn.com/v4/letter/d/d07c76/32.png) [@davidxray](https://community.cartalk.com/u/davidxray)\
**Post date:** [September 14, 2010, 5:41pm UTC](https://community.cartalk.com/t/check-engine-light-is-on/55128/1 "2010-09-14T17:41:47Z")

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My 01 f350 diesel is reading codes PO676 and PO683. I changed #6glowplug and relay. I reset the computer. The light on back on with PO676 code. How can I fix this.

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**Author:** ![PvtPublic](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/pvtpublic/32/13089_2.png) [@PvtPublic](https://community.cartalk.com/u/PvtPublic)\
**Post date:** [September 14, 2010, 6:14pm UTC](https://community.cartalk.com/t/check-engine-light-is-on/55128/2 "2010-09-14T18:14:35Z")

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Try this site and use the search DTC P0676 and DTC P0683. There seems to be some knowledgeable posting there.  
[http://www.ford-trucks.com/forums/index.php](http://www.ford-trucks.com/forums/index.php)

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**Author:** ![davidxray](https://avatars.discourse-cdn.com/v4/letter/d/d07c76/32.png) [@davidxray](https://community.cartalk.com/u/davidxray)\
**Post date:** [September 14, 2010, 10:54pm UTC](https://community.cartalk.com/t/check-engine-light-is-on/55128/3 "2010-09-14T22:54:52Z")

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thank you, I will try this.