Question about 2004 Jaguar S Type

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Failsafe engine mode

I recently bought a 1999 V reg S type from a none dealer garage and have had an intermittent fault with the display showing "failsafe engine mode". Initially, it will show the amber light as a warning and the car will continue to drive. However, once the red light comes on, the engine goes into "limp home" mode. Once stationary, the engine can be re-started and the car can be driven until the amber light re-appears followed at differing durations by the red light and "limp home" mode again. Unfortunately, the specific fault causing the problem does not register on the management system..! All 4 exhaust censors have been replaced - but the problem has re-appeared. Any suggestions other than having it taken to a local Jaguar dealership?

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  • Anonymous Nov 26, 2008

    I have a 2005 S-Type R and this just happened to me this morning. First time I have had any trouble in 3.5 years, 35,000 miles. Seems like a computer problem but it also complains about the park brake system not working. I might have to bring it to the dealer. Also says cruise control not available and I think the disc brake system is also not available. Starts fine and the radio works. Seems to have the same limp problem of driving slow after a minute or two but I didn't drive it yet.

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6 Suggested Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Warning icon and diagnotic message came on ''Failsafe Mode''

It sounds like your Throttle Position Sensor (TPS); located in the throttle body. (Diagnositic test may point to alternator or TPS; I experienced the same issue and although replacing an alternator is easier on the pocket book, it doesn't correct the problem; which will get worse.)
(My story) The amber transmission light would pop up; after a restart, it'd go off. Eventually this led into the engine dropping into safety mode (15-20 mph); while driving city/highway without fail everytime; inbetween driving distance became less and less. (prior to this I had taken my car in several times; each time they reset the computer and $$replaced my alternator, as suggested by my mechanic).
As soon as I drove it off the shop to my house, it dropped into safety mode; amber warning lights. Drove it back to the shop; had to replace the throttle body (the only way to replace a bad TPS). It can co$t anywhere from: $1700.00-$2,000.00 parts and labor. Shop around; because my shop diagnosed the problem part wrong, I got a deal (but it still cost me...). Since I had it replaced (April 2008), I haven't had a problem since. Jag Heaven (a parts company located in California) can ship parts anywhere; it was cheaper to do this than buy the part from my shop $aved $$$. Good Luck, hope this helps...

Posted on Dec 04, 2008

  • 64 Answers

SOURCE: Jaguar S type wont rev over 4500 revs

possible air mass meter

Posted on Feb 15, 2009

raygin
  • 322 Answers

SOURCE: my jaguar s type has a new message- failsafe

Sorry late reply - just seen this problem. The amber warning is basically saying a problem developing. The red and limp home action is showing more serious developement - But not always very bad news. Had car with same symptoms and it was a faulty sensor on engine, and another similar case was throtle position sensor. Get the car to a garage that can read the faults - so you know what the problem is that has been registered in the memory.
Hope this helps

Posted on Jun 03, 2009

  • 279 Answers

SOURCE: my jaguar started flashing the message "failsafe engine mode"

Go to your local garage (anyone) and have them read the OBDII code this will tell you what has caused the problem, cost for this should be minimal £7-10 ask them for all the reported codes you can check them out at http://www.bluejag.co.uk if you wish to find out what they mean.

Posted on Apr 05, 2010

alicantecoli
  • 22133 Answers

SOURCE: failsafe keeps appearing

take it to jaguar and have the software checked and any fault codes removed ,

Posted on Apr 30, 2010

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1 Answer

Transmission in failsafe mode


I would not be surprised if your module or parts you replaced needs to be programmed or put in sync with the transmission computer or engine computer. Check with the dealer. Sometimes they have some silly or eccentric methods to get everything working together again. Cars are not very owner friendly anymore...

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Failsafe keeps appearing


take it to jaguar and have the software checked and any fault codes removed ,

Apr 30, 2010 | 2000 Jaguar S-Type

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My 2000 Jag S type also keeps saying failsafe mode?


fail safe mode is something the vehicle computor will go into when there is a problem with the vehicle it allows u to get off the highway or road safely you need to take vehicle to repair shop or your dealer which ever u prefer Failsafe engine mode on a 2000 jaguar s type is caused by a stopped up throttle body. Jaguar says not to clean the throttle body since it has a protective coating to help keep deposits from accumulating. You can clean the throttle body as long as you use ONLY throttle body cleaner that states it is safe to use with a protective coating. The butterfly valve in the throttle body will actually stick not allowing air to flow into the manifold causing failsafe engine mode to kick in reducing the amount of power your engine will produce. To solve the issue just clean out your throttle body, it will cost you around $5 dollars and take 1 hour of your time.

Jun 07, 2009 | 2000 Jaguar S-Type

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My care keeps saying failsafe engine mode and it keeps cutting off? Do you by any chance know what's wrong?


Many things can cause this message, get it to a good jarage and have the fault codes read - this will tell you what is going on. Don't panic - it could just be a faulty sensor .. these cars are very prone to this. Try to avoid using a jag main dealer for the code readings as they are expensive and tend to ''overcompensate'' for repairs! Most good independant garages have the ability to read the fault codes.
Hope this helps - please post the fault when know.

Jun 06, 2009 | 2000 Jaguar S-Type

1 Answer

My jaguar s type has a new message- failsafe engine mode. when it was amber the car was ok but now that its red i have to limp home. how serious is this please. benn quoted a LOT of money at a jaguar main...


Sorry late reply - just seen this problem. The amber warning is basically saying a problem developing. The red and limp home action is showing more serious developement - But not always very bad news. Had car with same symptoms and it was a faulty sensor on engine, and another similar case was throtle position sensor. Get the car to a garage that can read the faults - so you know what the problem is that has been registered in the memory.
Hope this helps

Mar 30, 2009 | 2000 Jaguar S-Type

1 Answer

Software mismatch after changing auto gearbox on 55 reg S80 D5


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Failsafe engine mode


The failsafe mode can appear following numerous faults being detected - some faults can be momentary and register but not cause a problem. These are normally reset by just turning ignition off/on. get the fault code memory read at a garage and this may give you a clue as to a possible problem developing. Failsafe mode will give you reduced engine performance but will allow you to drive for normally some distance. If a serious problem developes your car message centre will tell you to shut off the engine or it will shut it down.
good luck.

Mar 15, 2009 | 2000 Jaguar S-Type

1 Answer

Failed safe engine mode 1999 V8 S Type


I've got a 2000 that did the same thing. Get this, it was caused by a defective trunk seal that let water in my trunk and got my wiring wet. Could'nt even shut off the car, only way to kill it was to pull the positve battery cable, negative won't kill it. After all dried out, and jag dealer reset my failsafe mode all good....... until now i have a .500 ma draw on power while sitting unused, brand new batteries down in 1 week??

Dec 29, 2008 | 2001 Jaguar S-Type

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