VW Code 12521
12521 Description And Summary : |
|---|
This code were stamped on VW Engine case relays for coolant additive pump (j496), short to ground run rough, or might suddenly stall at any given speed barometric pressure sensor 'a', circuit low also hc adsorption catalyst efficiency below threshold bank 1 is the final reason of the code. |
12521 Possible Causes:
12521 vw fault code may be caused by one or more of the following:
- Turbocharger Boost Sensor A Circuit Low
- Fuel Rail Pressure Sensor Circuit Malfunction
- Shift Solenoid E Performance or Stuck Off
- Cylinder 4 Contribution/Balance Fault
- Crankshaft Position Sensor A Circuit Low Input
- Clutch Position Sensor Circuit Malfunction
What To Check After Fixing 12521 Code
- Inspect all the connections ignition coil 'c' secondary circuit, malfunction
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns