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Is it possible to have active Pxxxx codes and NOT have the CEL light come on?

The CEL bulb is functional. It comes on when I turn the key without starting the car and goes off once I start cranking the starter.

Ten minutes of search yielded no answer. Thanks...
 

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I'm no expert on OBDII, but I've pulled codes out of my vehicle when the CEL was not on. If a diagnostic was performed, and threw a code, then performed again, and passed, the CEL may go away - the Pxxxx code is still logged in the PCM, and can be viewed.
 

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you can have a P1000 and no CEL
 
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