Hi there,
P0604 indicates an issue with the ECM. Here is a list of possible causes.
P0604 BMW - ECM Self Check Fault Read more: https://www.autocodes.com/p0604_bmw.html
P0175 indicates the fuel mixture is too rich on bank 2. Here is a list of possible causes.
P0175 BMW - Mixture Control 2 System Too Rich Bank 2 Read more: https://www.autocodes.com/p0175_bmw.html
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