BMW 745i - Recent Questions, Troubleshooting & Support
03 BMW 745i engine codes P0021,P034,P0393
P0021:"A" Camshaft Position - Timing Over-Advanced or System Performance Bank 2, check timing chain for wear
P0034 :Bypass Valve Control Circuit Low, check crank vent valve.
P0393 :Camshaft position (CMP) sensor B, bank 2 - circuit high input
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