Thread: Transmission fault

Ok I have a code P0748 pressure control solenoid A electricial
Where the hell do I start to look for that

Originally Posted by Russ066

Ok I have a code P0748 pressure control solenoid A electricial
Where the hell do I start to look for that

Google

Auto Transmissions R Us in Balcatta specialise in these units. Does it have any history of oil changes?

Originally Posted by PerthDisco

Google

Ouch.

Also from the D4 manual:

Originally Posted by DiscoDB

Ouch.

Also from the D4 manual:

There’s actually nothing to suggest it’s a common ZF / Disco problem so possibly an easy fix but well worth getting the basics done in a good service. If no service history the oil is probably like molasses by now.

Originally Posted by PerthDisco

There’s actually nothing to suggest it’s a common ZF / Disco problem so possibly an easy fix but well worth getting the basics done in a good service. If no service history the oil is probably like molasses by now.

Agreed.

A google search shows it is a common fault across many brands. Often just due to bad electrical connectors.

Worst case is the solenoid has failed, but given the experience with the D3/D4 would point to a bad connection somewhere.

Could be a leaking mechatronic sleeve allowing fluid into the connector, a fluid change and check of the connector would be where I'd start.
Then new solenoids and valve body rebuild.

Thanks all for your replies, I have got it going again at the moment and booked it in for a transmission service unfortunately can't get it in til late Jan but better than not at all
Thanks again
Russ

Originally Posted by Russ066

Thanks all for your replies, I have got it going again at the moment and booked it in for a transmission service unfortunately can't get it in til late Jan but better than not at all
Thanks again
Russ

Fluid change is a simple DIY job, the plastic pan/filter is harder if fitting the same again but the steel pan conversion is easy.