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Old 04-21-2018, 07:17 PM
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Join Date: Apr 2015
Location: Missouri
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Exclamation Trans failsafe and engine failsafe

**SOLVED**
Help!
I ran thru some water (at 50 mph)and not a minute later I got trans failsafe
And engine fail safe.
It died and I had to pull off the road, she wouldn’t restart and my obd 2 reader wouldn’t connect.
I’m gonna leave it over night and try again tomorrow.
What all is your first thought?
What should I bring with me to diagnose? (if it doesn’t just fire up)
I’m just sick. It’s been such a good car.
2005 e53 4.4 sport 150.xxx

SOLVED
When I hit what seems to be about 10 inches of water at 50 mph
It forced enough water in the ECU box to trigger the Engine failsafe prog.
I drained water from the main computer VDO box seemed to sealed.
THE FIX
Unplug everything remove the ecu, open it “small star screws” and airhose it
Use a (electronics cleaner spray to remove any corrosion due to water exposure)
spray silicone oil in to the box and Re-air hose it to distribute the spray.
NEXT
Return to the engine bay and air hose all the harness
(They hold a suprising amount of water)
Spray the connectors lightly with said silicone to repel water in the future.
That’s it!

Last edited by E46andE53; 04-23-2018 at 01:05 PM. Reason: Fixed solved
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Old 04-22-2018, 09:55 AM
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Sounds like shorted connections. Get everything dried out and I bet it comes back to life. Then find the connections with the bad seals and replace/repair


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Old 04-23-2018, 01:05 PM
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Fixed! It was water in the power box
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Old 04-23-2018, 02:22 PM
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That's awesome.


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