2011 L322 TDV8

I have been searching the posts but can't find anything similar to my issue.

Started intermittently getting the red Restricted Performance error a few weeks ago. The car seems to judder (Like a gearbox issue) then the warning light appears and the car goes into limp mode.

Used the car for a 180 mile round trip with no issues then the next day on a quick trip to the shops the error appeared.

I have checked for errors using the GAP IID tool and nothing is shown other than an error I have always had (P040D-00 EGR Temperature Sensor and occasionally and Water in Fuel sensor error which just seems to show as a yellow Restricted Performance error but the car still drives ok.

The car will drive fine with no errors after bein switched off for a while and the error sometimes can be cleared with the GAP IID tool but have had a few times where I could not get it to clear.

Anyone experienced anything similar and can advise where I should be looking or suggest another tool that may display more codes?

Any advice appreciated

First and cheapest thing is to check battery voltage, it maybe getting border line...
Should be 12.6volts 30 mins after fully charged...  Pete
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2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand Sold
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Sold
2002 L322 Vogue 4.4 V8 Epson Green (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Thanks. battery changed a few weeks ago, all charging good (New alternator last year)

Used GAP tool to register new battery

I do have another issue where the fuel gauge only goes up to just below half even when completely topped up (I filled it before the long trip)

Could this be related?

Maybe worth reading this
https://www.fullfatrr.com/forum/topic71911.html 2012 TDV8 Vogue (L322)

Thanks. On my list to do in the New Year

Hope you don’t need to drive far as the fuel guage fault can shut the car down. 2012 TDV8 Vogue (L322)

Did the restricted performance appear while accelerating?
If so, it could be the 2nd turbo change-over valve sticking (not being fast enough)

https://www.fullfatrr.com/forum/topic49556.html?highlight=csov 2012 4.4TDV8
2000 Honda S2000

It doesn't seem to be related to acceleration

UPDATE: Decided to fix the Fuel Gauge issue first. Turns out somebody had done it before but not crimped the connection securely so one of the wires had come off. After fishing about for a while to get the loose wire from an almost full tank I re-joined the wires and the fuel gauge is working normally now.
Unfortunately though I snapped the connector for the FBH fuel line so will have to try and glue it or get a complete new pump unit!.

Also changed the sensor to get rid of the annoying random Yellow Restricted Performance error for P2264-00 Water in fuel sensor circuit. £150 for the sensor & wiring and a 10 minute job to replace.

I think I have identified the Red Restricted Performance error after changing the settings on the GAP IID app to show Failed tests and get a P0486-17 code for the EGR sensor B circuit. When it occurs it does not clear with the GAP tool until the engine has warmed up a bit.
I can manage it for now but need to investigate changing the sensor. Have always had the sensor A circuit error so might as well do them both