Hi all,
Wondering if someone can shed some light on an issue i am having.
My golf developed a gearbox issue whereby it would jump out of gear and not automatically change out of second to third and so on. In auto mode, the gear change from first to second was as expected with the throttle moderately pressed. The car will not change from second to third and will hold the gear all the way up to the redline even with moderate acceleration. If I move the car into manual mode and use the steering wheel shifters, the car will behave fine! It will go through each gear as it should and hold the gear until it needs to drop down.
Since then i have changed the oil and checked the ABS/speed sensors and all seems ok (no errors in vcds) and performed a DSG adaptation and a defined test drive. This seemed to fix the issue and the gearbox kept to each gear correctly (both half and full throttle) but when I switched the car off and on again, it started doing the same thing (dropping out of gear and holding second for far too long). Just recently I have been informed that mech unit has had three flashes on it (not sure if this is three different maps or if its been flashed and then had been taken back to stock settings).
It looked like all roads led to a faulty mechatronic unit so i managed to source one and fit it however this also did not solve the issue, now I keep getting the below error code in vcds and its failing to run through group 65 (Reset Values (Pressure Adaptation))
18223 P1815 Pressure Control Solenoid 1 (N215), Short to B+
Symptoms are now as follows:
- Flashing PNRS on MFD
- No gear engagement (free revving engine in 1st gear)
- This only happens when the oil is up to temperature, the mechanic that is looking at the car for me has said it is fine when the gearbox/engine oil is cold
So now we seem to think is the gearbox at fault? The assumption is that when the oil is up to temperature, the oil becomes thinner therefore requiring more pressure to sustain a gear being held? Could there be internal wear to the gearbox that is preventing this?
Has anyone had to deal with something remotely similar? The new mech unit has gone off for testing incase it is a faulty solenoid however I am told the mech unit is relatively new and only fitted briefly before hand.
Thanks,
