Question about 1999 Jaguar XK8

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Stability control fail then engine fail mode i had this problem for a while it was on and off recently it happen more quite often. whenever it happen I had to turn off the engine and restart it again sometime it work sometime I had to do it several times. I check for this problem in the forum but it seem like there are quite a few different suggestions. cleean the wheel sensor, brake switch. By the way there was no code can be reads by my mechanic. I putted ASC off and the problem still there, it could happen anywhere sometimes on freeway sometimes at the stop light. i had problem with the mechanic before suggested me to change this change that It costed me a lot of money and the problem still there so if you have a specific answer to this proble please tell me

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This problem is due to the malfunction of the computer fitted in the car. You better reset the computer simply by pulling out the battery terminal cables for at least 10 hours and in the mean time clean all the sensors related to the stability systems like wheel etc. Then re fix the battery terminals cables and enjoy your drive.

Posted on Jul 22, 2009

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What causes the "Reduced Engine Power", "Service Stability Control" and "Traction Control" warning lights to come on?


the "Reduced Engine Power", problem causes the PCM to disable "Service Stability Control" and "Traction Control" turning on the warning lights to come on for those systems . The reduced engine power is because of a problem with the electronic throttle control system or as GM calls it TAC system . Reduced Engine Power Mode
When the PCM detects a condition with the TAC system, the PCM may enter a reduced engine power mode. Reduced engine power may cause one or more of the following conditions:
• Acceleration limiting--The PCM will continue to use the accelerator pedal for throttle control, however, the vehicle acceleration is limited.
• Limited throttle mode--The PCM will continue to use the accelerator pedal for throttle control, however, the maximum throttle opening is limited.
• Throttle default mode--The PCM will turn OFF the throttle actuator motor and the throttle will return to the spring loaded default position.
• Forced idle mode--The PCM will perform the following actions:
- Limit engine speed to idle by positioning the TP, or by controlling the fuel and spark if the throttle is turned OFF.
- Ignore the accelerator pedal input.
• Engine shutdown mode--The PCM will disable fuel and de-energize the throttle actuator.
© 2017 General Motors Corporation. All rights reserved.



Drive by Wire training Your best bet , take it to a GM dealer

Mar 04, 2017 | 2005 Pontiac Grand Prix GT

2 Answers

Trouble code 84-1 sensor logic failure


Red the oper ,guide, yet, or the FSM.
or at Alldata.com ?
why not get it serviced? if not say why not? so we can respond
in the correct way.. (you just want a wild guess?) what?
Vehicle Stability Assist


ok, so there are 2 possibles. (macro viewed)
  1. Driving wrong, or skidding.
  2. or a malfunction of the system.
only you know the truth of above.!
did you even read the operators guide?
how the lamp acts? VSA.? off, on, blinks, etc?
is this a post where there are no dealers or ASE mech, availible?
or no FSM? fixing modern cars FSM free is a huge, fail mode...
FIRST
if its a failure get the system scanned, ABS and PCM and BCM all?!

First of all you need to clear ABS errors
did you see the recall
http://www.edmunds.com/car-news/honda-recalls-182000-vehicles-for-faulty-vehicle-stability-assist-system.html

and guess what, bad brakes, make ABS fail and so will VSA.
in that order. so... SCAN IT ! then wonder. (all cars 1988 to now)


here is how it works ( it uses ABS) quote:

Vehicle Stability Assist

The Vehicle Stability Assist (VSA) was introduced by Honda to its vehicles in 1997. The term is Honda's version of Electronic Stability Control (ESC),[22] an active safety feature developed to correct oversteer and understeer by using several sensors to detect loss of steering control and traction while simultaneously braking individual wheels to help the vehicle regain stability.

How VSA Works

VSA combines the Anti-lock Braking System (ABS) and Traction Control System (TCS) with side-slip control to help stabilize the vehicle whenever it turns more or less than desired. ABS is an existing system that prevents the vehicle's wheels from locking up under braking, especially in slippery road conditions. For the ABS to work, the system relies on the computed input from a steering angle sensor to monitor the driver's steering direction, the yaw sensor to detect the momentum of which the wheels are steering (yaw rate), and a lateral acceleration (g-force) sensor to signal the changes in speed. At the same time, the TCS will prevent wheel slip during acceleration while the side-slip control stabilizes cornering when the rear or front wheels slip sideways (during oversteer and understeer).
Controlling oversteer - During an oversteer, the rear end of the vehicle will spin out because the rotational speed of the rear wheels exceeds the front wheels. VSA will prevent the vehicle from spinning by braking the outer front wheel to produce an outward moment and stabilize the vehicle.
Controlling understeer - During an understeer, the front wheels loses traction during cornering due to excessive throttle and causes the speed difference between the left and front wheels to decrease. When the vehicle steers outwards from the intended trajectory, VSA intervenes by reducing engine power and if necessary, also braking the inner front wheel.
unquote:

Feb 25, 2014 | 2006 Honda Pilot

1 Answer

Trac stabilizer light on, check engine light on, engine power reduced


It's all tied together in the computer system . When you start to loose control the computer takes over reducing engine power , applying brakes etc... to bring vehicle back into control . The throttle body on your vehicle is computer controlled . electronic throttle control . the gas pedal has sensors , the throttle body has sensors an a electric motor . The lights came on because the computer disabled these systems .

Feb 16, 2018 | 2010 Chevrolet Equinox

1 Answer

2000 Jaguar xj8 turn over won't start stability control fail light on.


the stab light comes on if the battery is low because you are cranking the engine your aj26 v8 engine may have a common problem for cars up to that model/year with worn nicosil coated bores ie. low compression check the vin no. at your jag dealer you can get it started by removing the spark plugs and putting a egg cup of engine oil in to each of the cylinders the first thing to do is to check for fault codes using a obd code reader for a clue followed by a compression test

Sep 25, 2017 | 2004 Jaguar X-Type

1 Answer

Stability control fail Jaguar XJ8


this may sound crazy but what sort of fuel are you running? Try filling the car with premium 98 octane and run it - if you are running inferior grade or dirty fuel the throttle body sensors will register a differential in the burn/energy and throw a fault. The bad news is that a faulty throttle body will cause the same problem and cost a fortune to replace.

Oct 19, 2009 | 1998 Jaguar XJ8L

1 Answer

BMW x5 DSC indicator lamp stay on and no power.


When the DSC Dynamic Stability Control light is ON your traction control is OFF. It will sometimes trigger the ABS light and the Rev Limiter it is an engine protection FAIL SAFE mode.
Check your brake switch on the brake pedal, this sounds like the problem wen replaced it will reset the Rev limiter, if the ABS light comes Check the wheel sensors

Jul 20, 2009 | 2001 BMW 325

1 Answer

Warning: fail safe engine mode


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

Jul 09, 2009 | 2001 Jaguar XJ8

2 Answers

Fail safe engine fail


this can be caused by a few things. Diagnostic Trouble codes needed to diagnose. many auto part store will read codes for free, please post codes

Sep 22, 2008 | 1999 Jaguar XK8

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