how to remove CEL code 21?

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Old May 26, 2005 | 07:28 PM
  #1  
ceLtic*
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Default how to remove CEL code 21?

how to remove CEL code 21??

i dont have the green plug, connected. i know its a 2 wire that goes to the ecu....could that be whats causing code 21 on my obd0-pw0?
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Old May 26, 2005 | 07:49 PM
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ceLtic*
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Default Re: how to remove CEL code 21? (ceLtic*)

any ideas?
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Old May 26, 2005 | 08:10 PM
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91civicEX's Avatar
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Default Re: how to remove CEL code 21? (ceLtic*)

that CERTAINLY is why u have a code 21. one wire should go to ground and one should go to a pin on ur ecu. i dont know which though but u should be able to find out.

EDIT: i just noticed ur sig. u can use almost any clip on the motor (eacv plug, air temp sensor, coolant temp sensor,) theyre all the same. just go to pick n pull pay the 2 dollar entrance fee and take a connector. its not stealing because u paid the 2 dollars.
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Old May 26, 2005 | 08:12 PM
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its a 2 wire switch thing right? you can try by taking of that green part and puttin those wire things on them.. like you have on the vtec sileniod and run them straight to the ecu.. one is ground and one goes to b5
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Old May 26, 2005 | 08:14 PM
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Default Re: (frankenfiend 04)

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Old May 27, 2005 | 12:10 AM
  #6  
ceLtic*
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Default Re: how to remove CEL code 21? (91civicLX)

i will be using this connector:





the guy i bought the connector off of soldered 2 wires on to there. 1 is ground and 1 is b5...thanks guys.
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Old May 27, 2005 | 12:11 AM
  #7  
ceLtic*
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Default Re: how to remove CEL code 21? (ceLtic*)

so that plug should work if wired properly?
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Old May 27, 2005 | 04:08 AM
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exactly.. i just wrote for you to use the other stuff cuz i thought you didnt have the plug.. the black is the ground and the green goes to b5
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Old May 27, 2005 | 04:45 AM
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Default Re: how to remove CEL code 21? (ceLtic*)

It doesn't matter which wire you ground and which you send back to the ecu since it's just a ground switch.
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Old May 31, 2005 | 10:03 PM
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ceLtic*
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Default Re: how to remove CEL code 21? (Davep)

thank you.
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