[foodmatt]

HI, I seem to have a odd one here... this doesn't seem to be the very common spring locator fault as i have very different symptoms

its a November 2017 model Xdrive X1 20d M Sport Auto just less than 27,000 Miles

Car starts, but Cannot engage any gear forward or reverse or even Neutral, the Gear lever will just go straight back into Park after a second or 2 and will not try to move!

Gearbox Code - GA8G45AW

fault codes Via Autel Diag...

420097 Permanent Solenoid Valve SC4: Shut as Defective

4200C1 Permanent solenoid Valve SC4: faulty Closed or oil pressure switch for SC4: faulty off...

when cleared.. after start up go to select a gear.. pops up drivetrain fault and these codes reappear!

gearbox fluid is all new and levels checked and correctly Done via Diag Tool

under live data with Snap On Diag Tool...
when selecting Drive.. it briefly saying its going into reverse...
when selecting reverse... briefly saying its going into 3rd gear

OBD Fault codes are Permanently Stored and Cannot be cleared...
P0736 Reverse incorrect ratio
P2809 pressure Control Solenoid G Stuck On
P2743 Transmission fluid temperature sensor B circuit high

We sourced and Brand NEW Valve Body unit for the gearbox as thinking that was the Failure (The solenoid faults) Replaced, carried out the Necessary Adaptions..
Exactly the Same faults

not under warranty im afraid

Thankyou in advance for any help

Regards Matt

[mathew_kb]

Hi Matt,

Have you have resolved the issue? My 220d (same gearbox) is having the same issue (since December) and still not sorted out yet. We got an extra code 4200B4 Solenoid valve SPH shut as defective. Was thinking to replace the mechatronics, but puzzled seeing your results.
Mathew

[foodmatt]

Hi,

we've got nowhere I'm afraid, sent the Mechatronics unit away (the original) with harness to a specialist to be tested and found to be all ok

had this with other manufacturers before with gearbox transmission error and never actually the gearbox... something electronic.. its just finding it!

these Gearbox usually fail with bad gear changes and judders...
not actually stop altogether we understand..

have you had any luck?
sorry for late response, its sat outside the workshop waiting for some more spare time or new knowledge

[mathew_kb]

Hi Matt, not sure I messaged you. Mine got fixed by gearbox specialist based in London. The fault was the oil pump chain and drive spoke broken. They said this is due to the engine swap done a month or so, which put pressure in the drive resulted this. Also said that some of the parts need upgraded to gen 2 gearbox as the gearbox will packup sooner due that bad design. I am still waiting to arrange collection of the car. If you need the details, I shall pass his contact.

Thanks

Mathew