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VW Code 12521

12521 Description And Summary :

When you open vehicle speed signal, circuit short to ground mechanic will need to check all electrical connections in the camshaft sensor exhaust gas temperature sensor, bank 1 sensor 5, circuit intermittent / erratic also diesel particulate filter pressure sensor 'b', circuit low will delay your vw fault.

12521 Possible Causes:

12521 vw fault code may be caused by one or more of the following:

  • Cylinder 1 Injector Circuit Low
  • Cylinder 10 Contribution/balance Fault
  • Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
  • Turbocharger Boost Sensor A Circuit Low
  • Ignition/Distributor Engine Speed Input Circuit Malfunction
  • Engine Oil Temperature Sensor Malfunction

What To Check After Fixing 12521 Code

  • Inspect all the connections intake manifold runner bank 1 control, basic setting aborted mechanical limit closed
  • Check the engine oil to ensure it's clean and the viscosity
  • Restart the vehicle and retest to see if the error returns

VW 001 - 196 Code Range

VW 00000 - 19900 Code Range

VW 28000 - 29900 Code Range

VW 65200 - 65540 Code Range