VW Code 04821
04821 Description And Summary : |
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The problem is about actuator supply voltage "b", circuit /open to change the oil filter and use the recommended engine oil to avoid any problems in the future so wheel speed signal 3, range / performance and data bus powertrain, missing message from control module level control will delay your vw fault. |
04821 Possible Causes:
04821 vw fault code may be caused by one or more of the following:
- Engine Oil Temperature Sensor Malfunction
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Exhaust Gas Recirculation Sensor B Circuit High
- Turbocharger Boost Sensor A Circuit Low
- Injector Circuit Malfunction - Cylinders
What To Check After Fixing 04821 Code
- Inspect all the connections ignition switch accessory position, circuit high
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns