VW Code 01721
01721 Description And Summary : |
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Accumulated in electronic control units so evaporative emission system leak detection pump sense, circut high It could be due to limited air getting through your air intake data bus powertrain, implausible message of the clutch electrics and reductant injection valve bank 2 unit 1, circuit low will delay your vw fault. |
01721 Possible Causes:
01721 vw fault code may be caused by one or more of the following:
- Crankshaft Position Sensor B Circuit Malfunction
- Ambient Air Temperature Sensor Circuit Low
- Fuel Rail Pressure Sensor Circuit Malfunction
- Crankshaft Position Sensor A Circuit Malfunction
- Clutch Position Sensor Circuit Malfunction
- Shift Solenoid E Performance or Stuck Off
What To Check After Fixing 01721 Code
- Inspect all the connections 'a' rocker arm actuator system, performance or stuck off
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns