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95 Posts
Discussion Starter · #1 ·
I have a Cali spec ecm. Code 21 and 28 was due to a fried resistors. This happened because I tied both of my o2 sensors together as i went NA-T. This method was incorrect. I now put everything back to normal. To fix the problem I opened the ecm and replaced the resistors. If anyone wants to see pictures or more information, please email/pm me.
 

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sorry to bring back this old thread but i am having the same problem and was wondering how exactly you fixed it. thanx
 

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DaveH disciple
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368 Posts
I've presently the same problem and installed my 02 sensors like you dude.....Check your PM PLZ !!!

lelou21
 
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