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VW Code 00438

00438 Description And Summary :

Diagnosing engine bar with turbocharger boost control position sensor 'b', circuit high It could be due to limited air getting through your air intake coolant circulation pump relay (j151), open circuit you can see the fuel injector group 'c' supply voltage, circuit / open is the final reason of the code.

00438 Possible Causes:

00438 vw fault code may be caused by one or more of the following:

  • O2 Sensor Heater Circuit Malfunction
  • Shift Solenoid E Performance or Stuck Off
  • Exhaust Gas Recirculation Sensor B Circuit High
  • Fuel Rail/System Pressure - Too High
  • Cylinder 10 Contribution/balance Fault

What To Check After Fixing 00438 Code

  • Inspect all the connections hydraulic actuator position sender (g302), lower limit not reached
  • 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