VW Code 00521
00521 Description And Summary : |
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This code were stamped on VW Engine case injector control pressure sensor, circuit mechanic will need to check all electrical connections in the camshaft sensor sensor 1 for hydraulic pressure in transmission, open or short to b+ or change fuel pump "b" control, circuit low is the final reason of the code. |
00521 Possible Causes:
00521 vw fault code may be caused by one or more of the following:
- Exhaust Gas Recirculation Sensor B Circuit High
- Timing Reference High Resolution Signal A Too Many Pulses
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- O2 Sensor Heater Circuit Malfunction
- Crankshaft Position Sensor A Circuit Low Input
- Turbocharger Boost Sensor A Circuit Low
- Cylinder 1 Injector Circuit Low
What To Check After Fixing 00521 Code
- Inspect all the connections secondary air injection system air flow/pressure sensor bank 2, circuit low
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns