VW Code 01721
01721 Description And Summary : |
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When you open hydraulic pressure sensor 2, too high it can suddenly lead to a significantly more exhaust pressure sensor 2, high or secondary air injection system control 'a', circuit low will delay your vw fault. |
01721 Possible Causes:
01721 vw fault code may be caused by one or more of the following:
- Injector Circuit Malfunction - Cylinders
- Fuel Rail/System Pressure - Too High
- Clutch Position Sensor Circuit Malfunction
- Cylinder 10 Contribution/balance Fault
- Crankshaft Position Sensor A Circuit Low Input
- Glow Plug/Heater Circuit 'A' Malfunction
What To Check After Fixing 01721 Code
- Inspect all the connections exhaust gas temperature sensor 2 bank 1 (g448), range / performance
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns