I was darn sooth for a couple of days, been driving for 10miles on minor "A" roads when "restricted performance" came up on the dash, no bong at all but there was no power, was coming to a slight incline so managed to pull off the road.

Went to turn it off, pressed the button and the engine started to die but instantly the ignition came back on quick enough to keep the engine running so basically I couldn't turn it off, I tried about 10 times and the same thing happened, switch off then back on before the revs dropped.....

Weird thinks I (I'm quick like that) I then thought what happens if I press and hold the on/off button? this worked and the engine switched off and the gear knob disappeared... then.... "bong" "Not in Park" came up on the dash, did about 3-4 bongs then disappeared then did it again, just kept cycling between blank dash and "Not in Park" obviously no way to put it in park and it now wouldn't turn back on... nothing on the button...

I reach for the big guns, out comes the IID and a short time later it's reading faults.... Just one

HVAC-Ventilation

B13C2-49 (6C) Windshield misting sensor - System internal failure - internal electronic failure

An old fault which one day I will replace...

I cleared the faults anyway and the IID shoved up lots of failure messages but was cycling through the ECU's

Then the bonging and the Not in Park messaged disappeared, I hit the start button, it started fine, with restricted performance now gone, drove on fine...

Drove around Londinium for another day, then 200 miles home, been out in it several times since and it's behaving impeccably.

I wondered about voltage but the main battery is brand new, just a week old and the second battery is at 12.6v at rest so I don't think voltage had anything to do with it...

Anyone come across this, is it a precursor to imminent failure, will it live till Christmas, should I sell it... Answers on a postcard

Pretty picture because we all like a photo...!!


 Pete
__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Last edited by Haylands on 18th Oct 2024 9:15am. Edited 1 time in total

new battery , maybe loose connection? ... - .- -.




Y. O. L. O.
.

Checked and double checked Stan, I instantly thought voltage but both batteries are perfect and correctly fitted...

It's probably one of those fatty idiosyncrasies....  Pete
__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

you're probably right Pete but its frustrating not knowing the cause..

only other things i can think of is the earth strap [under wheel arch?] and the stop/start switch.

i reckon you'll wake up at 3 am and know what it is...  ... - .- -.




Y. O. L. O.
.

Thanks Stan,

I did the earth straps when I did the ACE pipes so they are all good....

Stop/start button was changed when I bought it and I don't think that would chuck up the restricted performance, might do the turn off issue but it is just a switch that connects two wires so I doubt it...

It seemed a very specific issue so just wondered if anyone else had succumbed to it.... Pete
__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

It almost reads like there wasn’t enough power to go round, and that you were getting brown-outs of the systems in their electrical supply. ( like when you say the engine started to die, but the dash came back up as there was power now available the engine wasn’t using it)

Wonder if something like one of the main power relays were switching and so you were losing power partially. But on further startups they were holding ? V8 or else ...

Thanks for the thoughts, you could be right, I put it on here to see if someone had had similar but it appears not. I don't think I'm going to be able to search for it unless it does it again and stays like it..!!

If something is dying I suppose I will be the first to find out...

If not it's because it says "Range Rover" on the front and back  Pete
__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Here we are, 4 months and several thousand miles of fault free motoring and it does something similar...

Driving to Manchester airport to pick up daughter, 200 mile round trip, rush hour so lots of speed restrictions so the ACC is working overtime, about 80 miles from home and "restricted performance" comes up on the dash, we are doing around 60 and the car seems to run fine, as the traffic clears I accelerate to see if there is power and nothing happens, the cruise is holding it to 60, but set for 70, not enough performance to go any faster...

We were running late as there had been an accident so didn't have much time but stopped at the next services and switched off, all dash lights went out as usual but the engine was still running, no ignition on, a black dash but engine still running, it ran for about 5-10seconds (seemed like an hour!!) then switched off.....

Left it a few mins and restarted which it did fine but still with "restricted performance " showing. I pulled away and you could feel it was sluggish, I'd stopped in the petrol station so nowhere else to go but back out onto the motorway (with hindsight I'd have stopped in the car park)

It drove like a flat pancake but I soon realised the cruise was the best thing to use, set it, then increase the set speed and the engine would slowly get to about 60 with no problem.

We picked daughter up and I left it running, we drove a few miles to a pub for dinner, switched off and yet again the engine stayed on, then after about the same time, switched off...

We went inside and ordered and as we were waiting I went back outside and it started fine, with no faults showing....

I plugged in the IID, and it showed no fault codes apart from...

Using IIDTool BT V4.0 B2803

ACM-Audio System

B119F-11 (2C) GPS antenna - General electrical failure - circuit short to ground
HVAC-Ventilation

B13C2-49 (2F) Windshield misting sensor - System internal failure - internal electronic failure
( on 07-06-2024 15:46:05 at 78224 mi )
TVM-Television

B1D56-11 (2 Antenna 3 circuit - General electrical failure - circuit short to ground

These all cleared and only the misting sensor returned which has been there since I bought it

I switched it off, turned off immediately, had dinner, started fine again and drove 99 miles home with no issues...

This morning I have checked the batteries connections, and have looked at, prodded and poked anything else I can think of... IID still only showing the misting sensor...

Weird as well that there is no "bong of doom" at any time....

Sorry for the waffling but it is a weird fault and I was wondered if anyone else had had something similar...?

Picture as we all like one and you have been good reading this far...

could be,

split inlet manifold or hoses

map/maf sensor

egr valve ... - .- -.




Y. O. L. O.
.

Thanks Stan, I was thinking something similar, I gave it a full throttle test on the way home and it was fine so I don't think it's a split or a leak.... (you forget how rapid these things are when given the beans!!)

There is no misting anywhere under the engine cover...!!

Maybe I'll clean the map/maf and egr but I would have thought it would have chucked a code up for them..??

Sort of wish it would just break....lol....

(has anyone ever said that before....!!!) Pete
__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

I think you need to have that IIDtool with you all the time and read the codes as soon as the error pops up.

Is the foam thingie in the bonnet loose like the LR TIME youtube video?
Is there oil in the intake around the throttle body ?

When did you last change the air filters ? My BMW 640d threw a sporadic engine light error recently, which on investigation turned out to the air filters and there being a bad batch / poor design which was restricting the airflow into the engine enough it could sense it and throw an error. Changing to a new air filter has made a marked difference to the car.

If the car is sensing it cant draw enough air, could it be going into restricted modes ? Could it be trying to draw air from the system such that its pulling oils past seals which is allowing the engine to run-on ?

( I dont know btw, but my gut is telling me its in the inlet system somewhere ) V8 or else ...

Thanks for the input and taking the time to type all that, the IID lives in the car and was used immediately, any fault code will stay on the list until it's cleared...

Foam in the bag under the bonnet is fine, filters are genuine and only a year old and very clean...

No undue oil anywhere, I did take the pipe off this morning...

The running on was specific as if power had not been switched off....

Restricted performance came up at about 60mph on cruise gave no audible beep and put on a red engine light but still no codes....

It now runs beautifully, no faults, no smoke, no hiccups, oil level is fine, mpg is as it should be....

I'm wondering if it was as a result of a DPF regen, I'll have a look at those values tomorrow  Pete
__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Could it be a split which opens only on negative plenum pressure rather than under boost?

Such as overrun whilst cruising along, or when you switch it off, in both cases throttle body closes and it starts drawing through the split ? V8 or else ...

Thanks again, I've just been chatting with a mate who used to work for JLR as an engineer.

He's never heard of it before but is leaning towards an engine / transmission ground strap that has high resistance, or a poor connection, not along the lines of the wheel arch ground points but high enough to cause a difference between the chassis ground & the engine ground.

The lack of DTC’s suggests that it’s not a component or communication error, nor a ‘leak’ on the induction or charge air side – the ‘transmission not in park’ is the one that is saying low operating voltage due to the poor ground to the engine / transmission.

It won't be used now till February so I'll book some ramp time and have a good look...  Pete
__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-