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  #1  
Old 9th April 2010
somename somename is offline
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Default OBDII can't connect. bad ecu?

My '01 9-5 had been sitting for a few month, and I recently ran it to find it to run awfully. It did run a bit rough before but not nearly this bad. It can't hold idle, surges, and stalls. Any way, I tried to pull codes with my obdii reader but couldn't. I took it to a meachanic, but his reader couldn't connect to my Saab either. Is there something other than bad ECU that could be causing it? Thanks for the help.
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  #2  
Old 9th April 2010
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jwwells jwwells is offline
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Check to see if your throttle body is in "limp home mode" There is a YouTube video which explains how to reset it. Don't know why you couldn't connect the OBDII, but check the throttle body.
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  #3  
Old 10th April 2010
somename somename is offline
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I forgot to mention that before I left the car in storage, I installed PCV upgrade kit and also cleaned out the throttle body, hoping to improve the running condition. It didn't really help then, but it ran okay. Any way, it wasn't in limp home mode then. I'll check again tomorrow if it is now. Thanks.
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  #4  
Old 11th April 2010
ski ski is offline
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don't know what exactly your problem is, but it is not the ECU. The car will not run with a bad ECU (if it were fried) it won't even sorta start and sputter.
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  #5  
Old 11th April 2010
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Couldn't get a fault code via OBD-II on my Renault, turned out the OBD socket had a 20A fuse on it, we replaced the fuse and hey presto OBD port up & running again.
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  #6  
Old 11th April 2010
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Drain the old fuel and add fresh stuff or if its already pretty low, just top it up with fresh. Gasoline can go bad after only a few months and no longer combusts as it should.

Last edited by mt.aero; 11th April 2010 at 11:57 AM.
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