How to Solve BMW A0AA Fault by Resetting CAS ELV Steering Lock?

A0AA is a very common fault stored in BMW Car Access System (CAS). The fault can cause an annoying light and bing noise or even non start.  You can carry out a reset using an Autel MaxiSys system (i.e MaxiSys Elite, MaxiSys MS908P etc).

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Model example: BMW 630i coupe 2007

 

MaxiSys reads fault code: A0AA in CAS control unit

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How to erase fault code A0AA?

 

In MaxiSys Elite scanner, go to Diagnostic Function->BMW->Manual Selection-> 6 series->E63/E64->630i_N52_COUPE->EUR-RHD->model year 2007_03

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Confirm vehicle information

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Select Service function-> Drive->CAS->Reset internal ELV fault counter

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The internal ELV fault counter must be reset and a control unit reset performed after replacing the electronic steering lock.

Continue service function

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Resetting internal ELV fault counter and performing control unit reset.

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The internal ELV fault counter was reset.

Read the fault code memory out of the CAS control unit.

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Service function finished

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Go to Autel MaxiSys Diagnostic function and choose Auto Scan

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Select CAS Car Access System

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Read codes

Then Erase codes

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Codes have been successfully erased.

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No fault codes detected.

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Done.

 

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