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7 Series - E38 (1995 - 2001)

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  #1  
Old 03-02-2013, 05:19 PM
Giddyup7585 Giddyup7585 is offline
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Location: Philadelphia
 
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Mein Auto: 2000 BMW 740i
1998I Engine Light, Can you hide it???

I am looking to save a 1998 740i, and they are telling me the engine light is not on. If you have the correct diagnostic tool, can you clear errors, so they do not show up???, thus hiding the fact that there are currrent problems? I just want to make sure i do not get taken for a ride, lol. I understand, things will go wrong. Its an old car.

I am thinking of buying a basic diagnostic reader to see if it shows any errors stored.

Thank you all in advanced and i will keep you posted on what happens
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  #2  
Old 03-03-2013, 09:32 AM
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Yes, with a basic OBDII code reader you can clear codes so the light turns off for a little while.

However, you can combat this with your own reader. When you plug it in it will show you which monitors are initialized and which aren't. The monitors take about 50 + miles of driving to initialize, and usually (though not always) a CEL will come back on before that period is over. So, if any monitors are still initializing you know it was recently reset and hasn't even been driven 50 miles yet. A caveat to this is if a mechanic just repaired something they often reset the computer, so if they just repaired something it may not be dishonesty.

Any errors in this post are purely Swype's fault, not mine.
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  #3  
Old 03-04-2013, 06:06 AM
Giddyup7585 Giddyup7585 is offline
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Location: Philadelphia
 
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Mein Auto: 2000 BMW 740i
I am going to pick up a code reader this week, i have never used one. I am guessing this is a stupid question, unless all readers are the same. Where do you go and look for the codes that are aren't initialize.

I am looking at a cable from a company called bmwcable.com Has any body ever sued this product? It states is can do pretty much everything = This cable allows full Coding , Programming and Diagnostics for your BMW
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  #4  
Old 03-04-2013, 09:53 AM
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QSilver7 QSilver7 is offline
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Mein Auto: 1997 740iL / 2006 X5 4.4
OBD II compliance and being able to read OBD II codes (CEL/SES/MIL warning lights are only related to electronic engine emissions systems)...is different from hardware/software that can communicate with the BMW's proprietary communication bus. So buy a scanner/reader based on what you want to accomplish...just reading/scanning/clearing OBD II codes...or having the capability to communicate with the entire communication bus.








(Most OBD II scanner/readers can only communicate over the TXD II lines...and are limited to the control modules that handle electronic engine emissions. It requires BMW proprietary hardware/software or aftermarket hardware/software to communicate with ALL the control modules over all the communication bus lines)
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Last edited by QSilver7; 03-04-2013 at 09:57 AM.
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  #5  
Old 03-04-2013, 12:35 PM
setconstr setconstr is offline
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Mein Auto: 2001 740i sport 2006 m6
http://www.peakeresearch.com I think these are the best for simple functions as reseting or reading codes ......
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  #6  
Old 03-04-2013, 01:13 PM
Giddyup7585 Giddyup7585 is offline
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Mein Auto: 2000 BMW 740i
Will this also let me see the code that were reset and didnt clear ?, just want to make sure nothing is hiding the background
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