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16 Posts
Discussion Starter #1
:wtflol: What's going on guys! For some reason I can't get code 21 to clear. I have done everything I knew. Well.... I think everything to clear the code. What happen is my O2 sensor wire fell on my turbo and the wires had melted together, so I cut out the bad ones and wired it back up. Now, the code21 stays on and I have unhooked the battery and pulled the EFI fuse. Could it be that my ar/fuel ratio is not correct? Just did 550 ssafm defcon dp fpr 225 fuel pump.
 

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Just some guy
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1,681 Posts
Well, you might have gotten lucky and just hosed your O2 sensor. Replace it and cross your fingers. But yeah, your ecu may be toast too.
 

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475RWHP 449TQ and climing
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5,911 Posts
Well, you might have gotten lucky and just hosed your O2 sensor. Replace it and cross your fingers. But yeah, your ecu may be toast too.


Or it needs to be reconnected properly. Check connections then replace o2 sensor then ecu check which I doubt!
 

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Premium Member
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4,409 Posts
ya i doubt it too the efi fuse woulda blown before the ecu.

Swap in a working o2 first and see if that works...

And
 
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