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> Code 21 flashing
post Jan 15, 2010 - 5:50 PM
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56willysnut



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CEL came on on my son's ST, reads code 21. Replace front oxygen sensor? anything else?

Posts in this topic
- 56willysnut   Code 21 flashing   Jan 15, 2010 - 5:50 PM
- - Mstoochn   QUOTE (56willysnut @ Jan 15, 2010 - 6...   Jan 15, 2010 - 5:52 PM
- - 95st-celica   yea...that should clear it   Jan 15, 2010 - 6:06 PM


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