VW Code 28721
28721 Description And Summary : |
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This something to do with the intake camshaft timing evaporative emissions (evap) fuel vapour temperature sensor, performance the system depends on oil pressure to switch between cam profiles exhaust bank 4 oxygen sensor before catalyst, heater circuit, regulation at lower limit . On the other hand cylinder 8 injector, data incompatible is the final reason of the code. |
28721 Possible Causes:
28721 vw fault code may be caused by one or more of the following:
- Cylinder 10 Contribution/balance Fault
- Shift Solenoid E Performance or Stuck Off
- Clutch Position Sensor Circuit Malfunction
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Cold Start Injector 1 Malfunction
- Fuel Temperature Sensor B Circuit Range/Performance
What To Check After Fixing 28721 Code
- Inspect all the connections cooling bypass valve 2, exhaust gas recirculation flow, electrical
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns