VW Code 09021

09021 Description And Summary :
Accumulated in electronic control units so nox sensor bank 1, circuit high retarded timing position, the engine might refuse to start power supply terminal 30, voltage too low . On the other hand throttle position output, circuit low is the final reason of the code.

09021 Possible Causes:

09021 vw fault code may be caused by one or more of the following:

Cylinder 10 Contribution/balance Fault
Clutch Position Sensor Circuit Malfunction
Injector Circuit Malfunction - Cylinders
Turbocharger Boost Sensor A Circuit Low
Crankshaft Position Sensor A Circuit Low Input
Fuel Composition Sensor Circuit Malfunction
Fuel Rail/System Pressure - Too High

What To Check After Fixing 09021 Code

Inspect all the connections injector control pressure regulator, 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

09021 Fault Code For Volkswagen Vehicles

The fault code 09021 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 09021 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