Auto Trans Error Code 00258 - Solenoid Valve 1 (N88)

[MrT]

I have not used the old GAL for a year, started it up today as it needs its MOT and it seems to have an auto transmission problem and is (electronically) stuck in failsafe 4th gear. I get the following error in VAG COM.

 

00258 - Solenoid Valve 1 (N88)

        30-00 - Open or Short to B+

 

which also leads to engine fault:

 

18032 - MIL Request Signal Active (Check TCM for errors too!)

        P1624 - 35-10 - - - Intermittent

 

Resetting the code just brings it back again. Disconnecting the battery for a couple of minutes also does not clear or enable the error to be cleared.

 

If I put it in tiptronic gear mode, then clear the fault it changes to first gear, but on putting it back into drive the fault instantly reappears.

 

I have a feeling that this is going to be too expensive a repair on a 13 year old car, which is a shame as it was otherwise immaculate and has not yet done 40K miles.

 

(Galaxy 2.8i Auto)

 

 

[chrispb123456]

I think I would be checking the wiring loom to the gearbox and multiplug also the TCM module which is on the inner wing panel to the right of the battery.

[MrT]

What seems to have cleared the fault, I have no idea for how long or why, was to put it in Tiptronic which selected "4", clear the fault using VAG-COM which changed the gear to "1" with a bump, then turn the engine off whilst still in tiptronic first gear. On restarting the fault did not re-occur. One thing I noticed was that when the fault occurred and the car was in drive, every gearbox number (DPNR54321) was highlighted on the dash when normally only the selected gear is.

 

Thanks for the reply and lets hope the fault has gone.