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Old 10-06-2012, 11:33 PM
robertobaggio20 robertobaggio20 is offline
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Join Date: Oct 2009
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Originally Posted by BMWFatherFigure View Post
Another ECU 'reset' is to disconnect BOTH battery terminals and the join the CAR'S battery wires together for 5 minutes or so. Can make improvements.
Let me suggest another method that takes almost no time and requires no tools and will not get your hands dirty and will not entail you removing your rear seats.

Just unplug the ecu and plug it in back after 5 minutes. Codes gone.

Try it right now. Create a code on your car by disconnecting the maf while it is running. After 3 minutes, turn off the engine, replug the maf back, and do the stomp test, to confirm that there's a code. Then unplug the ecu and plug it back in after 5 minutes. Then repeat the stomp test. There will be no more codes, Please try it and let us know how it works.

If it fails to work somehow, then repeat the test to recreate the code, unplug the ecu, the key2 the car (ignition key in position 2, position 3 is ignition itself) for 5 minutes, then reassemble everything and repeat the stomp test. Can't remember which works better but the 5 minutes is there to bleed capacitance and residual charge from the ecu that might otherwise keep the code there, I've not been able to confirm or deny if this is necessary, its probably just another urban myth but since its effortless and FREE why not.
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