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I installed a new air filter and unpluged sensor going into side of it.As soon as i drove the car the engine light come on ,so pluged this sensor back in but the light is still on . How do i turn engine light off ?
 

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The SES (service engine soon) light is triggerd when it detects a problem.
If you check for DTC codes you should be abl to see why the light was triggered.
I believe, if the problem does not occur again for a certain number of ignition cycles the light will go out on its own.

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White Diamond '03 DHS (with DTS floor shift)
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Powerglide is correct. If you do not clear it via the onboard computer, it will go to history and turn off the light after three ignition cycles with out the fault being detected.
 
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