P062F Long term memory

[eboggs_jkvl]

It seems that my ECM has died and the dealer replaced the ECM and reflashed the program. Still screwed up with a P062F & a P062L Code.

My Alternator died to start this fiasco. My battery was killed due to the alternator. Now the ECM is gone.

What the hell is going on?

[eboggs_jkvl]

This isn't related to this is it?

http://forum.efilive.com/showthread.php?t=5828

[joecar]

Dead/undercharged battery overloads alternator which causes its rectifier bridge to get fried...

I don't know how this could kill the ECM;

An arc from battery/alternator positive to ground can kill the ECM.

[eboggs_jkvl]

The DIC went off and said check the charging system. I did and the voltage was low coming out of the alternator. I ran it too long getting back home after the warning. The last straw for the battery was moving the car to the street to line it up for the tow truck to take it to the dealer. I think the Alternator went first and then the battery.

[GMPX]

I suspect the long term memory codes are showing because the ECM cannot do it's normal flash memory updates on shutdown (it always writes some data to flash on shutdown). In the older LS1 type PCM this might happen because the battery to too low (below about 10V), but it should not be as much of an issue on the E38.
So did the new ECM actually fix the problem?

Cheers,
Ross

[Doc]

That blows. How about this theory. Seeing how we are in Hell's kitchen right now in Florida, could this be a case of yet another GM/ AC Delco side post battery puking it's acid right down on top your pcm and more importantly the wiring to it? I would demand to see the condition of the pcm as it sits before they start shotguning batteries and pcms. If they don't clean things up real good you might be in for a double feature.

Secondly, great reason to get a AGM Battery (Optima).

[eboggs_jkvl]

The codes are still flying after the ECM change. They are stumped and are getting Detroit involved for answers.

I'll ask about the battery and if it puked. If it did, I will ask for wiring verification and I'll get an optima for them to use. I DO NOT like the Delco pukers.

[Doc]

Wiring.

[eboggs_jkvl]

Well, supposedly the car is fixed.

Alternator, New PCM, and tightened down the loose wire on the starter. Sigh.

[Doc]

E I'd still pull that wheel and just give it a looksee.