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Discussion Starter · #1 ·
Just been out in the jagwah for the first time in 2 weeks and after about 3 miles the restricted performance message came up.

Came home and switched off and it didn't come back on.

Went round the block and it was fine right up to the red line.

havnt had it on the Obd reader yet but a quick trawl though the engineers test mode showed 12v on the battery

it's been stood for around two weeks apart from moving it off the drive to get the mg out.

Not had this problem in 3 years.

any ideas??
 

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12v is quite low should be 12.6v for a fully charged battery
give it a good charge over night
 

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Discussion Starter · #4 ·
Had it on charge overnight but it's still the same.

Went up the road in it this morning and it happened straight away.

Switched off and it went away but came back almost immediately.

In the other display it says limiter not available, I've had my code reader thing on but nothing is logged fault code wise.
 

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Does it happen on kickdown?

"Limiter not available"?

Should be able to look it up in one of the manuals.

Try the Workshop Manual from www.jagrepair.com

Might be a Messages section.

Measure the actual voltage across your battery after turning on the headlights for 3 minutes with the engine off, and tell us what you see.

An overnight charge is always just a "Maybe OK but could be dead".

The next thing is to find your radio code then do a "Hard Reset" of the electronic modules, and do the Resets listed in the thread in our S Type Stickies including the Throttle Pedal Limits.

Let us know your voltage.

There is a voltage drop of around 0.4 volts along the battery cables.

.
 

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Discussion Starter · #7 ·
Done the voltage test.

12.11v on initial ignition but not started.

11.62v after 3 minutes of headlights on.

14.78v at startup.

This battery that's on it is a jaguar branded one.

Ive had it 3 years so may be getting on a bit.
 

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Thanks.

Ok, your charging system is fine but your battery is dying or dead.

First tighten the battery cables ar the terminals, it's possible they are dirty or loose.

There are 2 choices, new battery right away or get a C-TEK MXS 5 Smart Charger first, around £60, and use its RECONDITION Cycle to try to recover the battery first and replace it if it doesn't recover.

If you need a new battery Tayna.co.uk deliver next day by courier, excellent service, but check their prices, they are usually cheaper than others but sometimes they are a few quid more.

The battery is Type 019, I use the Varta H3 Silver Dynamic or Exide 017TE.

Both (actually all new) standard car batteries are calcium content batteries and the 3-litre and 2.5-litre S Types cannot fully charge them nor AGM batteries.

Your diesel does so don't worry, so +1 for Diesels ;)

It's the short days and short journeys in winter with headlamps and everything on that flattens and kills batteries.

The C-Tek smart charger will be useful to top up through winter too if you need.

Let us know how you get on.

.
 

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Discussion Starter · #9 ·
Had the battery on a 3 day charge and it's still the same.

Just ordered a lion 019 battery from eurocarparts for £141.00 discounted to £85.00.

Part number is 444770191.

Will this be suitable??
 

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Yes, the Type 019 is the physical size of the battery and position of the terminals so should be a perfect fit.

It's 100Ah and 800 CCA so all good there.

I'm not sure about quality or life of Lion batteries so I can't comment.

But with 3 years'warranty you're well covered.
 

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Discussion Starter · #11 ·
Still got the restricted performance message coming on despite fitting the new battery.

wife seems to think could be something to do with fuel filter, hasn't been changed for few yrs.

have they got an air mass meter?

running out of ideas, last thing is getting rid but don't want to do that but no good to me sat on drive

any ideas????
 

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Have you done all the resets including throttle position limits?

We really do need code readers for these cars, we're shooting in the dark without codes.

Yes there is a MAF, it's right in view in the large air hose from the filter, and I can't remember but maybe 2, and some models also have a MAP sensor as well.

I did ask our chaps some time ago to check theirs so I could make a sticky for everyone's info but, you know how it is. Cant be blathered into anything that means leaving their sofas. Same for charging voltages. :roll:

Anyway, a good clean of all 3 sensors might help, but often it doesn't and only a replacement solves the problem.

Fuel trims show fuel mixture problems, but I'm told diesels have a fueling map or three and I don't know how that works with trims. Have you checked yours?

A knock sensor was responsible for someone else's RP recently but the best is to take it to an independent Jaguar specialist for diagnosis and change the right bit yourself.

Otherwise you'll be spending dosh for nowt instead of lots of beer.

Get a smoke test done for leaks too, just in case.

.
 

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Discussion Starter · #13 · (Edited)
SOLVED!! RESTRICTED PERFORMANCE...

By my semi-professional mechanic wife..

well she has, in the past reshelled a 3 Litre Capri, rebuilt an Essex V6, coached me through getting my bike started after it being stood for 6 months, got my project mini running after me having 3 days of head scratching and stripped all the parts off a Honda cbr600 for me to reframe!!

she also drives fast cars, rides motorbikes and used to drive busses!!

think she's a keeper!!

new battery didn't cure the fault so, her advice was new fuel and air filters plus a tin of wynns diesel egr cleaner.

i replaced the filters and she did the spraying of the egr cleaner as per instructions.

She then took it for a drive and all the pace and grace has returned!!
 

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RP Mode

SOLVED!! RESTRICTED PERFORMANCE...

By my semi-professional mechanic wife..

well she has, in the past reshelled a 3 Litre Capri, rebuilt an Essex V6, coached me through getting my bike started after it being stood for 6 months, got my project mini running after me having 3 days of head scratching and stripped all the parts off a Honda cbr600 for me to reframe!!

she also drives fast cars, rides motorbikes and used to drive busses!!

think she's a keeper!!

new battery didn't cure the fault so, her advice was new fuel and air filters plus a tin of wynns diesel egr cleaner.

i replaced the filters and she did the spraying of the egr cleaner as per instructions.

She then took it for a drive and all the pace and grace has returned!!
Wow, some useful wife you have there! I keep getting restricted performance mode on occasion and the local indie hooked it up on the magic box which read that one side EGR valve was faulty. I since used some fuel additive which did make things slightly better (less often RP mode) but the Wynns stuff you talk about might be the answer.
Cheers!
 

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Discussion Starter · #16 ·
Sorry Jim but that's a definite no way.

Shes mine, all mine!!!

although I may share some of her nuggets of knowledge from time to time.

also, I forgot to mention, she had a Daimler double six back in the day!!
 

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Get her a new toolkit for Xmas, so you can borrow it and give her less excuse not to do the plumbing etcetera! ;)

Glad its sorted, intermittent problems are so frustrating.

.
 
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