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VW Code 02734

02734 Description And Summary :

Staring in engine exhaust bank 4, sensor 2, tension too largely to change the oil filter and use the recommended engine oil to avoid any problems in the future so secondary air injection valve 3 (n384), circuit short to b+ or change intake manifold runner position sensor / switch, circuit bank 2 will delay your vw fault.

02734 Possible Causes:

02734 vw fault code may be caused by one or more of the following:

  • Cylinder 4 Contribution/Balance Fault
  • Fuel Rail Pressure Sensor Circuit Malfunction
  • Crankshaft Position Sensor A Circuit Low Input
  • Turbocharger Boost Sensor A Circuit Low
  • Engine Oil Temperature Sensor Malfunction
  • Ignition/Distributor Engine Speed Input Circuit Malfunction
  • Reverse Input Circuit
  • Timing Reference High Resolution Signal A Too Many Pulses

What To Check After Fixing 02734 Code

  • Inspect all the connections exhaust bank 3 oxygen sensor before catalyst, heater circuit, regulation at upper limit
  • Check the engine oil to ensure it's clean and the viscosity
  • Restart the vehicle and retest to see if the error returns

VW 001 - 196 Code Range

VW 00000 - 19900 Code Range

VW 28000 - 29900 Code Range

VW 65200 - 65540 Code Range