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  #21  
Old 01-05-2016, 12:53 PM
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Quote:
Originally Posted by Quatro40 View Post
Hi did you see my other pics, it shows undervoltage or overvoltage at most modules. Let me know what you think after looking at those. Thanks.
I saw codes showing undervoltage and not even 1 for overvoltage.
If there is overvoltage condition the transmission computer will switch to safe mode and there will be a definitely clear code showing overvoltage.
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  #22  
Old 01-05-2016, 01:36 PM
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A recommendation: check for codes again in a week. I had an intermittent water pump not reaching commanded speed for about 6 months. Doesn't cause a MIL. Gave up the ghost- seized. Stranded and 1st tow bill in over 20 years. Those codes may be a warning.
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  #23  
Old 01-05-2016, 03:21 PM
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Originally Posted by bawareca View Post
I saw codes showing undervoltage and not even 1 for overvoltage.
If there is overvoltage condition the transmission computer will switch to safe mode and there will be a definitely clear code showing overvoltage.
Very interesting. I hadn't come across such in my reading. That, with the general ignorance about batteries and charging, might explain some mysterious flurries of error codes.

I really do think that most integrated circuits have input voltage regulators.
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  #24  
Old 01-05-2016, 03:48 PM
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Originally Posted by Doug Huffman View Post

I really do think that most integrated circuits have input voltage regulators.
They all do. But the transmission solenoids dont have voltage regulators. At 3-4 volts or more over nominal the solenoids characteristics will change significantly.
I have had 2 N62 powered cars recently that will have similar symptoms. All is good at idle and low RPM. Once the RPM jump over ~2000 the trnsmission will go in safe mode. Having ISTA connected while driving I find the voltage to reach 18-19v. Overvoltage codes were to be found in most modules,7-8 at least.
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  #25  
Old 01-08-2016, 12:06 AM
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Got the car back today, overheating issue fixed. New water pump and changed the thermostat any way, radiator flushed, oil changed, battery reprogrammed and all codes clear , and coding of some comfort features all for $1300 not bad.

After reprogramming the battery the alternator started behaving normal. Car went back to 24 mpg highway.

Thanks all for your input.

If you are in NJ I recommend Vanos Motorsports in Carlstedt, N.J. to do the job.







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  #26  
Old 01-08-2016, 01:21 AM
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I would keep an eye on your oil level AND oil quality.

If in 500 miles you see nothing going on between coolant and oil, you dodged a bullet.

Nice shout out to Vanos Motorsports.
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  #27  
Old 01-08-2016, 02:12 AM
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I definitely will. SAV is driving like brand new.

Last edited by Quatro40; 01-08-2016 at 10:45 AM.
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