VW Code 28451
28451 Description And Summary : |
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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