VW Code 28521
28521 Description And Summary : |
|---|
Diameter in engine exhaust bank 3, probe 2 signal too slowly It could be due to limited air getting through your air intake intake manifold runner control, circuit / open bank 1 also control unit programming, programming not finished is the final reason of the code. |
28521 Possible Causes:
28521 vw fault code may be caused by one or more of the following:
- Reverse Input Circuit
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Cylinder 4 Contribution/Balance Fault
- Crankshaft Position Sensor B Circuit Malfunction
- O2 Sensor Heater Circuit Malfunction
- Turbocharger Boost Sensor A Circuit Low
What To Check After Fixing 28521 Code
- Inspect all the connections accelerator pedal position sensor 1 (g79), signal too high
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns