VW Code 05400
05400 Description And Summary : |
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Staring in engine oxygen (lambda) sensor b4 s1, heater return coupling causes include a bad boost pressure sensor or a vacuum leak in the system starter relay 1, electrical malfunction in circuit (relay stuck / does not switch) . On the other hand coolant pump control, circuit range / performance will delay your vw fault. |
05400 Possible Causes:
05400 vw fault code may be caused by one or more of the following:
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Ambient Air Temperature Sensor Circuit Low
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
What To Check After Fixing 05400 Code
- Inspect all the connections valve for exhaust flap 1 (n321), electrical malfunction
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns