2000 S-type Fail Safe Engine mode is intermittent.

The engine has developed a misfire,most likely. Did the check engine light come on or start flashing? If so, find out what codes has set to determine which cylinder is misfiring and then proceed with the repair.

The car is trying to tell you something - listen to it, or pay a lot to fix it later.......

let someone scan for engine code.
replacing parts wont help.
ford have fuel pump problems to

2005 explorer showing engine fail safe mode and wrench

Have your ECU fault codes read, this should give an insight into the cause

Hi Walter, the fail safe mode is for getting you home when something goes wrong and you need to move the vehicle a short distance. If it is engaged you should take the vehicle for a scan and find out what is wrong. Regards John

Hello! Fail safe mode is when the vehicle's computer detects a serious problem an allows you to "limp" off the road or highway safely.

Fail safe mode on a Jaguar is mainly caused by a dirty and gummed up throttle body. The throttle body on your auto has a protective coating, so you can not use just any cleaner. It requires a throttle body cleaner that states "safe to use with a protective coating". The butterfly valve in the throttle body will actually "stick out". This causes fail safe mode to kick in reducing the amount of power your engine can produce.

Also check the plugs on your ECM (computer) and make sure they are all seated properly.


Guru...............saailer


I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

I do not know about a Jag. But the "fail safe engine mode " on my GMC means the Engine Controll Computer has quit working.

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.

i had this problem last week and i changed my oxygen sensor under the engine not the one on the side see what number sensor does the diagnostic give no1 is side of engine and no.2 is under engine