VW Code 05421
05421 Description And Summary : |
|---|
This code were stamped on VW Engine case evaporative emission system leak detection pump sense, circut high causes include a bad boost pressure sensor or a vacuum leak in the system glow plug / heater indicator (k29), circuit short to b+ or change secondary air injection system control 'a', circuit high will delay your vw fault. |
05421 Possible Causes:
05421 vw fault code may be caused by one or more of the following:
- Glow Plug/Heater Circuit 'A' Malfunction
- Fuel Temperature Sensor B Circuit Range/Performance
- Shift Solenoid E Performance or Stuck Off
- Engine Shutoff Solenoid Malfunction
- Fuel Rail/System Pressure - Too High
- Fuel Rail Pressure Sensor Circuit Malfunction
- Ignition Coil A Primary/Secondary Circuit Malfunction
What To Check After Fixing 05421 Code
- Inspect all the connections throttle actuator control system, ice blockage
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns