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Check Engine Light - but no symptoms

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Old Jan 20, 2016 | 09:46 AM
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Check Engine Light - but no symptoms
Does anyone have experience with Check Engine, but no perceived symptoms in performance, sounds, drive, etc.?

95,400
2001 996 C4
 
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Old Jan 20, 2016 | 11:34 AM
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Best guess, bad O2 sensor.
 
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Old Jan 20, 2016 | 01:20 PM
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Get a code reader and provide us with the code(s). Autozone, PepBoys, etc. will read the codes for free but it's a good idea to have one on hand. If the CEL is flashing, don't drive the car.
 
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Old Jan 20, 2016 | 02:08 PM
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P0740 Torque Converter Clutch Solenoid Circuit / Open
P1411 Secondary Air Injection System Malfunction
 
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Old Jan 20, 2016 | 09:24 PM
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Well I was going to guess 02 as well.... looks like I would have guessed wrong lol
 
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Old Jan 21, 2016 | 11:32 AM
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From my Understanding the Secondary Air is a VERY common CEL on these cars.... I got a CEL Yesterday and found it was due to my gas cap not being (1) click tighter...
 
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