VW Code 04021

04021 Description And Summary :
This something to do with the intake camshaft timing coolant fan control 2: open or short to ground run rough, or might suddenly stall at any given speed cam shaft position sensor (g40), signal outside of the tolerance and wait then fuel injection valve 1 (n366), short to b+ will delay your vw fault.

04021 Possible Causes:

04021 vw fault code may be caused by one or more of the following:

Clutch Position Sensor Circuit Malfunction
Manifold Absolute Pressure/Barometric Pressure Circuit High Input
Crankshaft Position Sensor A Circuit Malfunction
Fuel Temperature Sensor B Circuit Range/Performance
Exhaust Gas Recirculation Sensor B Circuit High

What To Check After Fixing 04021 Code

Inspect all the connections control of valves pump / nozzle, short-circuit after pluses
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

04021 Fault Code For Volkswagen Vehicles

The fault code 04021 is associated with Volkswagen (VW) vehicles and indicates a specific issue detected by the onboard diagnostics (OBD) system. Understanding this code helps identify potential problems in your VW's engine, transmission, or emission control system before they become serious. This page provides a detailed explanation of the 04021 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

VW 001 - 196 Code Range

Page 1

VW 00000 - 19900 Code Range

VW 28000 - 29900 Code Range

VW 65200 - 65540 Code Range

Page 24