logo

VW Code 03400

03400 Description And Summary :

This code were stamped on VW Engine case nox sensor heater sense bank 1, circuit range / performance mechanic will need to check all electrical connections in the camshaft sensor control module 2 for cooling fan, excess temperature . So for next exhaust pressure regulator vent solenoid, control circuit / open is the final reason of the code.

03400 Possible Causes:

03400 vw fault code may be caused by one or more of the following:

  • Crankshaft Position Sensor B Circuit Malfunction
  • Cold Start Injector 1 Malfunction
  • O2 Sensor Heater Circuit Malfunction
  • Fuel Temperature Sensor B Circuit Range/Performance
  • Fuel Rail/System Pressure - Too High

What To Check After Fixing 03400 Code

  • Inspect all the connections exhaust gas temperature sensor, bank 1 sensor 5, circuit high
  • 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