CODES U2023-86 & P117E-00

[KCTippi]

Hi all,
I'm really looking for some help/assistance/guidance.
Snap-on diagnostics kit reads codes of:
U2023-86 & P117E-00
Intermittent fault - GEARBOX then restricted performance. Its been a month today the last time code appeared and driving today in came up once, clears once you stop and restart. Vehicle had gearbox service in last 2 months and new battery in January.
2010 3.6 TD V8 6 gears.
Where do I start? Please thank you

 

[Dippypud]

Hi all,
I'm really looking for some help/assistance/guidance.
Snap-on diagnostics kit reads codes of:
U2023-86 & P117E-00
Intermittent fault - GEARBOX then restricted performance. Its been a month today the last time code appeared and driving today in came up once, clears once you stop and restart. Vehicle had gearbox service in last 2 months and new battery in January.
2010 3.6 TD V8 6 gears.
Where do I start? Please thank you

What does your gearbox live in ?

 

[KCTippi]

L322