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If you don't reset codes with a VAG do they always stay resident?

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Old 01-30-2003, 08:52 AM
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Default If you don't reset codes with a VAG do they always stay resident?
Like when changing ECU it throws an loss of power to the ECU code. Does that always stay resident until the VAG clears it or does it clear itself over a period of time? If so anybody know how long?
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Old 01-30-2003, 08:53 AM
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I believe the ECU power-loss code stays resident, has to be cleared with VAG tool.
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Old 01-30-2003, 08:55 AM
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Default Some are permanent, others temporary. Depends on the nature and severity of the error.
But AFAIK they all can be cleared with a VAG.
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Old 01-30-2003, 08:58 AM
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Default I don't have a VAG and i like to switch my ECU's before going in for sevice so ...
I wanted to know if I needed to reset the Loss of power code or could I just switch a week before and have the code reset itself?
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Old 01-30-2003, 08:59 AM
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Default From a personal experience, the dumb Air Bag light may flicker in cold weather if it holds a code
More specific, from a power loss
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Old 01-30-2003, 09:02 AM
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As Andy said, that one's permanent, can only be cleared with a VAG tool.
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Old 01-30-2003, 09:03 AM
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Ok. Thanks all!
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