The jaguar it is a 2017 xf premium I bought on auction … it has some rupture on the coolant line which I’m replacing but the main issue I would say it is probably that when i press the start button one time it seems that everything it is okay, but when I press the brake and then I press the start button it doesn’t start it actually just turn off right after. So there is a problem that I can not find. I am to turn on the car directly to a relay in the engine rear fuse box I was able to drive the car around the block but I had to stop because of the leakage of the coolant which I will be replacing the bad part today but how can I fix the turning on??? Do you have any ideas ?? Sorry to bother you but I need help with this issue… the below are the codes that I get from a scanner….. thanks for the help….U0073

'A" Off

Control Module Communication Bus

U0401



nvalid Data Received From ECM/PCM "A"

>

U0002

Performance

High Speed CAN Communication Bus

>





Clear Confirmed & Pending Trouble Codes

く

6 Permanent Trouble Codes

P0062

HO2S Heater Control Circuit Bank 2

Sensor 3

>



C0034 Right Front Wheel Speed Sensor

>

P0061

HO2S Heater Resistance Bank 2

Sensor 3



U0073

Control Module Communication Bus

"A" Off



U0401

nvalid Data Received From ECM/PCM "A"

>



P0162 02 Sensor Circuit Bank 2 Sensor 3

 

Test the starter relay first. There's the same relay at the fusebox inside the trunk/boot. I think it's for the rear windshield heater. Swap that one and see if it starts. Battery should be fully charged + and - connector cables are clean and bolted tight. If does not start, place the key fob on the left side of the steering column and press start.
What error message do you get on the dash/instrument panel when you start the car?

 

Have the battery load tested at an auto service shop. These cars are very sensitive to battery condition. While the battery is out, touch the + and - cables together to reset everything.

 

I changed the relay for a new one, I changed the battery for a new one and I did try the key to the left of the steering wheel and I still nothing. When I try turning it on I don’t get any error message it just goes off.

 

Things to consider as in this discussion on Land Rover forum. Note: Land Rover and Jaguar share the same technology in their vehicles. JLR is owned by TATA
https://landroverforums.com/forum/lr...-start-103970/

 

Hey ! thanks so much for that link ! I was able to replaced the Wheel sensor on the front right wheel and ABS seems to be working fine now. I still can not get the car to start by pressing the button, only directly hitting the 40amp relay in the engine bay. The only code i`m receiving now it s a P0512-73 Starter request circuit.

 

Have you done water service in the engine area, if so do not start the car remove ecm and let it get check by electrician for any water or burning of ECM board. if so can get another ecm and program the car. Let me know if solved or found any of these as mine was solved by doing more steps.