2 PROBLEMS

1st issue: Over the last 2 years the car would start perfectly sometimes. Other times I would attempt to start it 2 4 6 8 times before the car started.

2nd issue: Last week the car wouldn’t start and I flattened the battery, immediately the car wouldn’t lock, neither would the car recognise the key in any way and says; “Check Smart Key”

• I have charged the car battery
• I have put a new battery in the smart key
• I have inserted the smart key into the slot

RESULT: Nothing other than, “Check Smart Key”

I cannot plug a computer in as the car doesn’t recognise the smart key.

Any suggestions?

 

Running the battery down with a difficult start seems to induce all manner of errors in these cars. First thing I would try is disconnecting the battery terminal and then reconnecting, this often resets the security system.
I have read that with the battery disconnected, touching the positive and negative cables together resets error codes; I think (not certain) that I have done this successfully in the XF at some stage but can't recall what error I was trying to clear.

 

+1 to touching terminals together with battery disconnected, I wouldn't do it too often though heard it can confuse ecu.. also remove battery earth from car body end and sand or grind the paint from under the main earth cable. Solved quite a few of my issues. Do the same for any other earth cables you find under bonnet etc.

 

Do you have only one key?
If you have another does it do the same thing?
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