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Thread: 3S-GE diagnostic codes 21 and 51

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01-05-2007, 02:06 AM	#1 (permalink)
Unco Official TN Member Join Date: Jan 2007 Location: Brisbane, Australia Posts: 445 Gameroom cash: $1500 Thanks: 0 Thanked 0 Times in 0 Posts	3S-GE diagnostic codes 21 and 51 i'm getting 21 and 51. it's a gen4 celica with a 3S-GE. according to the following website: http://www.toyotacelicaonline.com/error.htm it says the following: 21: 2, then 1 Oxygen Sensor Signal 51: 5, then 1 Switch condition signal it does state, however, that those codes are for gen6 celicas. is anyone able to confirm that the codes are the same for gen4 cars? also, what is a "Switch condition signal"??? TIA __________________ 1977 P6 Ford LTD 351 Cleveland Last edited by Unco; 01-05-2007 at 02:08 AM.

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