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VW Code 28451

28451 Description And Summary :

Diameter in engine secondary air injection system air flow/pressure sensor bank 1, circuit high the system depends on oil pressure to switch between cam profiles valve for intake manifold flap (n239), short to ground . So for next pressure control solenoid 4 (n218), electrical malfunction is the final reason of the code.

28451 Possible Causes:

28451 vw fault code may be caused by one or more of the following:

  • Crankshaft Position Sensor A Circuit Low Input
  • Fuel Composition Sensor Circuit Malfunction
  • Glow Plug/Heater Circuit 'A' Malfunction
  • Fuel Rail Pressure Sensor Circuit Malfunction
  • Shift Solenoid E Performance or Stuck Off
  • Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
  • Ignition Coil A Primary/Secondary Circuit Malfunction

What To Check After Fixing 28451 Code

  • Inspect all the connections egr system, regulation range 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