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-   -   03 325ci Automatic gearbox warning fault P0705 position switch (http://forum.e46fanatics.com/showthread.php?t=949158)

gusmagoo 10-07-2012 02:09 PM

03 325ci Automatic gearbox warning fault P0705 position switch
 
Hi all. New to the forum so go easy on me.... Had a few nice motors in my time but presently a BMW virgin.
A pal of mine has offered me his silver 03 325ci sport auto with 64k on the clock so I've been test driving it for a few days now. (now bought) Here's the issue... It's been off the road and not run for about a year and has only covered 14 k in the last 7 years, all of which time I honestly don't think it's even been serviced (by him) but the oil seems strangely clean. The dash is only showing -750 so 750 miles overdue an Inspection. (now had a full service).
After charging the battery and bringing the vehicle back to life, excersing the gears in all modes faultlessly I stopped to reverse but was a bit sloppy with the shift and hadn't fully stopped going forward before attempting to get it into reverse, it clunked a bit and carried on but the dreaded gerbox check light came onand went into limp mode. That was the first time. It now does it intemittently when placed in park.
The warning cog disappears when you re start the car, every time. I will do some research and be back soon, anyone with any thoughts please speak up! Great site BTW! Learnt a lot already... :thumbup:

j_block 10-07-2012 03:22 PM

I have had that light before. Shut off car, wait a couple of minutes and its gone. Idk what caused it but I did a manual swap anyways

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gusmagoo 11-06-2012 06:21 AM

Hi all,

My initial post didnít throw up many responses so now that weíre a few weeks down the line I thought Iíd give a quick update on my situation...

I bought a diagnostic lead and software so been having a play with that on my notebook, managed to establish a P0705 fault within the gearbox which is an intermittent fault on the ďneutral position switchĒ (part number 24107507818). DIS suggested checking all connections and lines first before thinking about replacement... It only happens when the car is cold and can be replicated only by wiggling the shift lever whilst in PARK, or having been placed in park... Nowhere else... (the parking pawl can be faintly heard and felt when applying the brake so that rules any problem out with that)
Iíve decided to have the gearbox oil / filter/ sump change widely recommended, and see if things improve. I donít want to fork out £225 ($360) plus labour for a new switch unless Iím absolutely sure thatís the problem. (The oil change is only £150!) So many times before you hear of replacements not fixing a problem... Iím starting with the obvious in having the oil change, and am also going to clean my MAF which may be contributing to a fluctuating idle. The vehicle has recently had a full service so when I have observed it running for a few more weeks Iíll report back with an update.
I know that there is a switch of some sort right next to the shift lever so I can't help thinking that because the cog of death appears when the shift lever is wiggled around it MIGHT be something to do with that??? (part no.8171666) Anyone with any thoughts on this??? Cheers...

axtonmarinschek330 04-11-2015 02:48 AM

Today Im busy with my 01 330i, when I took it to the mech, he got a code that's also p0705, and now I have opened my whole center console to see whats the prob. All I've found so far is that the small solenoid that is incharge of keeping the gearlever in the P or N position when the brake pedal is not pressed, only pulses out and then stays in, I don't know if this is because of the switch that is responsible of the levels. Can someone please help to inform, if that the switch is a contact switch, that can maybe get dirty and cause problems, or is it a type of reed switch or magnetic sensors, that works with n small magnet that could have broke. I would like to find out myself, but it's n bit risky for me now to take the whole lever apart.

gusmagoo 04-11-2015 03:59 AM

Hi pal... please read all of my posts regarding this fault code... I suspect you may be looking at the wrong end of the cable! The malfunctioning part is likely to be the switch unit i have previously described in detail, which is on the side of the gearbox itself, NOT under the shift lever... you're wasting your time messing with the lever... that has different fault codes in my experience...

axtonmarinschek330 04-11-2015 04:16 AM

Thanks, Ill check it now, I did not know about the one next to the gearbox, but you learn from not asking, haha

axtonmarinschek330 04-11-2015 04:38 AM

Just an update, I was just under the car and saw the connector, next to the gearbox,and as I was cleaning it,the whole plug fell out, I cleaned it neatly, sticked it back in and see to that it screw on,and when I turned the key, boom, rod cog gone, thanks for the info, I would have been busy until tomorrow if it wasn't for the info

gusmagoo 04-11-2015 04:39 AM

Ok well i fixed mine by changing out the switch... it was expensive but cheaper than a gearbox swap... google the part number in my previous posts they can be sourced for around £220 ;-)

gusmagoo 04-11-2015 04:45 AM

Excellent!


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