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General E46 Forum
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Old Yesterday, 07:47 PM   #1
DakotaBlayne
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Join Date: Aug 2014
Location: Birmingham Alabama
Posts: 5
My Ride: 2000 BMW 323Ci
2000 BMW 323Ci Tranny Safety Mode Help

Hey guys , im new here and now the proud owner of a mint 323ci

i Bought the car 2 days ago for 2500$ , the car has 162000 miles and runs great and drives like a dream , well on my first commute to school i was hoping on the highway and i was doing 60mph and the car was in 5th gear (its auto steptronic) and then the car shifts into 4th and the gear with a ! turn on where the gear indicator is , i immediatley stop the car and call around and look for help online (where i found this forum) and i continues to drive the car slowly to school after checking all the fluids , after school i took the car to autozone and did a battery and altenator check which was all good , i reset the car and drove it and it wont go into safety mode unless doing above 60mph , so today i took the car to a specialty mechanic and the checked the computer and cleared the codes and told me somthing about a sensor and then told me i just need to replace the whole tranny , i found the absurd sense the car shifts out fine , well since they cleared the codes i drove the car home and got up to 80mph and all the way home with several stops without it happeneing again , i thought it was gone , i mean the car shifts SO smooth and no slipping , so i came home and parkewd the car thining the codes were cleared and solved the problem , but no it came back the same way.

so im assuming since the car set the sensors reset causing it to come back , well i know the trannys good and have seen alot of forums with this problem just not a on point answer , please help Thanks '
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Old Today, 12:13 AM   #2
NumbaOneNewb
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Join Date: Jul 2012
Location: Portland, OR
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My Ride: 2001 bmw 330ci
I've had a cog wheel come on before myself but it eventually went away and never came back.
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Old Today, 06:08 AM   #3
DakotaBlayne
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Join Date: Aug 2014
Location: Birmingham Alabama
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My Ride: 2000 BMW 323Ci
i hoped

O was hoping I was home free , BUMP someone chime in who has had this issue? I love this car haha
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Old Today, 02:22 PM   #4
DakotaBlayne
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Join Date: Aug 2014
Location: Birmingham Alabama
Posts: 5
My Ride: 2000 BMW 323Ci
Bump
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Old Today, 02:22 PM   #5
DakotaBlayne
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Location: Birmingham Alabama
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My Ride: 2000 BMW 323Ci
Anyone?
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Old Today, 03:34 PM   #6
brazzers
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Join Date: Aug 2014
Location: Atlanta
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My Ride: 04 330Ci 6MT
What were the codes?

Quote:
told me somthing about a sensor
What did he tell you, specifically?

I had a similar problem that I traced to the CPS (crankshaft position sensor). In my case though, it was the reference wheel (the thing on the crank the sensor reads pulses from) that had somehow broken. It was a $40 part that cost me a new motor.
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Old Today, 08:43 PM   #7
DakotaBlayne
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Join Date: Aug 2014
Location: Birmingham Alabama
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My Ride: 2000 BMW 323Ci
The codes I pulled today were P0735(gear 5 incorect ratio)
And then I also pulled a P17?? Which I found was a bad thermostat

The car only does this with speeds above 60mph , the jerks onto 4th gear , this is not as often the more I drive it but I guess I going to jack the car up and do an oil change and oil change on the tranny , and clean the electrical contacts on the harness

Any input would be great , also where is the turbine and speed sensor located?
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Old Today, 09:33 PM   #8
dslboomer
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Join Date: Jul 2007
Location: Show-me state
Posts: 532
My Ride: 2001 BMW 330I
This is my research result:
1. Maybe bad transmission wiring (leaked inside the wiring)
http://forums.bimmerforums.com/forum...ect-Code-P0735

2. Valve body wear per the response at the bottom of the above link: this must be known around transmission repair service industry. You may call transmission repair shops and inquire about it.
If I were you, I will shop around this repair instead of wasting you money and time replacing fluid.

http://www.transgo.org/Research/Tech.../5L40E-INS.pdf
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