VW Code 10521
10521 Description And Summary : |
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The problem is about secondary air injection system air flow/pressure sensor bank 2, circuit intermittent / erratic the system depends on oil pressure to switch between cam profiles secondary air injection pump-d-relay (j705), circuit open circuit and exhaust gas temperature sensor 2 bank 1 (g448), high will delay your vw fault. |
10521 Possible Causes:
10521 vw fault code may be caused by one or more of the following:
- Cylinder 1 Injector Circuit Low
- Fuel Temperature Sensor B Circuit Range/Performance
- Glow Plug/Heater Circuit 'A' Malfunction
- Shift Solenoid E Performance or Stuck Off
- Reverse Input Circuit
What To Check After Fixing 10521 Code
- Inspect all the connections valve for pump - jet: cylinder 11 (n307), regulation range exceeded
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns