Question about 1999 Jaguar XK8

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ECU problem I have a 1999 Jaguar XK9? The original ECU ref LNF1410BB/112 failed. I bought a used unit but twice I was sent another ref & this one is LNF1410BD and it mentioned XJ8. I was told it is compatible but the motor does not start. Can you help me?

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Maybe you should check the electricity of you machine.... the wire you use is not compatible.. or the the motor was to high voltage compare the last you used.

Posted on May 25, 2009


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I have a 2000 jaguar s type and mechanic stated that I need an engine computer module. Any ideas of out the door costs including repairs

if the Engine Control Module failed your car would not run. They don't go a BIT faulty, they either work or they fail.

for a ball park estimate of what one costs, there a number here, but I would take Dennis's advice


and here

2000 2001 Jaguar type Ecm Parts

Jun 21, 2016 | Jaguar Cars & Trucks

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I inherited a 1998 ford escort that ran when my uncle had it but never since I got it I put a new ecu in it does it need to be reprogrammed for that car.

There are MANY factors that will make a car fail to run, the least of which is the ECU. The ECU is plug & play, IF it is the CORRECT ECU! It is VERY rare for the ECU to fail unless the car has been improperly jump-started or has been immersed in water (which will cause even more problems).

Put the original ECU back into the car and check the following:
  1. Is the fuel system working?
  2. Is there spark?
  3. Is the timing belt intact?
You will likely find that the failure is not the ECU.

May 16, 2014 | Cars & Trucks

1 Answer


ABS = Anti-lock Brake System.
TC = Traction Control System (Engine Control Module).
If the ABS lights on the dashboard permanently the ABS system is faulty. You must access the ABS & TC Electronic Control Units (ECU) memory for pull out all DTC (Diagnostic Trouble Codes), using diagnostic equipment connected to the data link connector of the car. Then you will be full informed about bad pieces (e.g.: front right wheel abs sensor interrupted, ...). After bad pieces replacement you will be able to erase all faults memored by ABS ECU, in other words reset the ABS system and turn off the warning lamp on dashboard.

I suspect bad brake pedal switch, but you should scan the ABS & TC ECU's.

Jul 02, 2011 | 2001 Jaguar XJ8

1 Answer

My air bag light is on

You need to access the Airbag ECU (Electronic Control Unit) using VAG or similar diagnostic equipment connected to the data link connector of the car, in order to pull out all DTC (Diagnostic Trouble Codes) memored. Then you will be full informed about bad components, and you will be able to repair & replace bad pieces. After reparation it's necessary to erase all faults from Airbag ECU & reset it. The Airbag ECU warning light can only be turned OFF using suitable diagnostic equipment! Disconnecting the battery will not turn OFF the Airbag ECU warning light!
Good Luck!

May 29, 2011 | 1999 Volkswagen Passat

1 Answer

I have a 2001 jaguar s type 3.0 liter and i replaced the ecu module and the vehicle doesnt start . is there any setting or resetting i have to do fo it to start thanks

First thing to determine is if your ecu module ,has the same hardware,software references as your original ecu.If this is the case,and you havent changed anything else,like keys or ignition switch or immobilizer,then it should start!
If ecu doest have same references,you need to have it coded by the dealer,so that it works with your immobilizer.

Mar 05, 2011 | 2001 Jaguar S-Type

2 Answers

Unable to diagnos because computer is not registering

special software used on europeon market vehicles ,dealer only

Dec 27, 2010 | 1999 Jaguar XK8

1 Answer

Engine failsaft mode

find fuse box search diagram for fuse labled(hazard/HZD) remove for 15 sec and put back in you have reset the ECU

Apr 04, 2010 | 2005 Jaguar X-Type

1 Answer

Suspected immobiliser problem

Immobilizer unit is connected in series with the neutral safety switch.

Next time your Luxes GS fail to start.....put you foot on the brake,shift to NEUTRAL (N) and turn the key.

A shorting/shorted neutral will draw power and kill the battery.

Give it a try.

Please post result on the comment window.

Oct 27, 2009 | 1999 Lexus GS

2 Answers


I recently had the same code come up when my car failed to start in the mornings. It also said that the crank sensor had failed. Having changed the sensor and still not starting it went back to the garage. According to a Jag enineer the ECU will fail to register if it gets less than 12v from the battery, this will also throw up several codes for the diagostics. Solution, change the battery. Problem solved.

Jul 22, 2008 | 2002 Jaguar X-Type

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