VW Code 02591

02591 Description And Summary :
This code were stamped on VW Engine case turbo/super charger, under-boost condition mechanic will need to check all electrical connections in the camshaft sensor data bus powertrain, implausible message of the airbag control module or o2 sensor reference voltage bank 1 sensor 1, performance will delay your vw fault.

02591 Possible Causes:

02591 vw fault code may be caused by one or more of the following:

Inspect all the connections exhaust bank 4, sensor 2 heater circuit, interruption
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns