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VW Code 05821

05821 Description And Summary :

This something to do with the intake camshaft timing exhaust aftertreatment fuel injector 'a', performance retarded timing position, the engine might refuse to start supply voltage for fuel injector group b, short to ground and wait then direct ozone reduction catalyst deterioration sensor, circuit intermittent / erratic is the final reason of the code.

05821 Possible Causes:

05821 vw fault code may be caused by one or more of the following:

  • Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
  • Fuel Composition Sensor Circuit Malfunction
  • Cylinder 10 Contribution/balance Fault
  • Crankshaft Position Sensor A Circuit Malfunction
  • Clutch Position Sensor Circuit Malfunction
  • Cylinder 1 Injector Circuit Low
  • Engine Shutoff Solenoid Malfunction
  • Ignition/Distributor Engine Speed Input Circuit Malfunction

What To Check After Fixing 05821 Code

  • Inspect all the connections manifold absolute pressure / mass air flow - throttle position correlation at higher load
  • 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