Automotive Forums

Any ideas on a Fail-Safe mode amber warning light coming on? Comes on every 5-10 minutes or so after about 20  minutes driving. comdes on for a few seconds and then -off again!

Nothing seems to be wrong with the car (temperature guage is ok)but it is a little irritating....

Any ideas?  

Didn't see the sticky at the top,heh? Did you get the codes read?

Gary  

pleasant1:
Any ideas on a Fail-Safe mode amber warning light coming on? Comes on every 5-10 minutes or so after about 20  minutes driving. comdes on for a few seconds and then -off again!

Nothing seems to be wrong with the car (temperature guage is ok)but it is a little irritating....

Any ideas?

Our vehicle has started 'Fail-safe' after 60,000kms and Jaguar dont care.
The problem is attributed to the throttle body assy.($4,500 AUS) and it is intermittent. We went away for a week (1500kms) and it was perfect, came home and went intoF/S 6 times in 10kms. We cant drive anywhere now and cannot purchase a used T/Body.
I would buy a new one but am scared what the next costs will be to keep it running.
Have also replaced, watertank, many faulty hoses, by-pass tube (the small spigot becomes brittle and snaps off), heater control valve Etc.
It could also be due to throttle position sensor.  

I would get the codes ran. As far as the throttle body problem; are used throttle bodies that hard to come by? You could probably find a good used one at a local salvage yard. That way you won't feel like you're selling an arm and a leg to get one and maintain it.  

Similar problem. I replaced the throttle body assembly so it doesn't go into limp mode anymore. Now my failsafe comes on as an engine fault but the car is driveable although it surges a little. I played with the mass air flowmeter but that doesn't seem to be the issue. The idea of a throttle position sensor is my next try. Any other ideas?