Question about 1998 Jaguar XK8
Failsafe engine mode and shows P1586 code on scanner
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Posted on Jan 02, 2017
SOURCE: failsafe mode
Per Jaguar's codes:
P1576 Pedal Position Not Available
I'm assuming your car is a drive-by-wire setup (instead of having a throttle cable, it'd have a potentiometer at the pedal, and the more the pedal is pressed, the greater the voltage output at the pedal, which is translated to a throttle opening percentage underhood by the computer). It sounds as if you have a problem with the pedal, or with the computer's ability to read the throttle angle you're pushing for. Does the car currently drive OK? Or are you having driveability issues? Post up a little more info and we can take it from there.
Posted on Jul 25, 2008
SOURCE: 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.
Posted on Mar 20, 2009
Just a quick mention - for about a month my XK8 low coolant light came on intermittently. This week with no notice while driving normally I got Stability Control Fail and FailSafe Engine Mode and wtih great difficulty got the car back to where I started from (less than a mile). Two days later (when got time) and after a bit of research, I tried it again - same problem and a very unhappy engine. I then disconnected the battery for 15 minutes (probably more) to clear the engine codes as well as check all the wiring and vacuum stuff I could under the hood (at a Jaguar master mechanic's recommendation). No problems found but the car would start and immediately stall with the air intake hose disconnected from the intake butterfly. After I reconnected the air intake hose, she started and purred like normal. The problem is the BATTERY... It is low - I've known it for a LONG time BUT it always started right up and never skipped a beat. I intend to replace it tonight but fully expect that's the issue. I've had the car 6 years (it's a 98) and had NO problems except a dead taillight asembly.
Hope this is of value...
Posted on Apr 22, 2009
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.
Posted on Dec 13, 2009
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Hello and welcome to JA!!!
I'm Billy and i will assist you with this.
The codes you have (the ones not interpreted) mean the following:
p1351: glow relay circuit faulty, p1586: power supply to rail sensor, air mass meter, EGR valve: voltage too low.
These problems are the ones causing the no start issue...........
I will first list the fault details:
And now, the most probable reason for your problem, would be faulty wiring.
So i suggest that you check the wiring harness thoroughly, and the fuse boxes (connectors, fuses etc.....)
As these are the most probable culprits.
It could be a faulty ECU (engine control unit), however, i think that faulty wiring is the most likely cause.......
on further diagnostics the engine start permission is off does this point to anything
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