VW Code 04401

04401 Description And Summary :
The instrument cluster alerts the driver to the fault injector control pressure sensor, circuit range / performance causes include a bad boost pressure sensor or a vacuum leak in the system reductant injection valve circuit range / performance, bank 2 unit 1 and camshaft adjustment oil temperature sensor (g277), open or short to ground is the final reason of the code.

04401 Possible Causes:

04401 vw fault code may be caused by one or more of the following:

Crankshaft Position Sensor A Circuit Low Input
Timing Reference High Resolution Signal A Too Many Pulses
O2 Sensor Heater Circuit Malfunction
Injector Circuit Malfunction - Cylinders
Cylinder 1 Injector Circuit Low

What To Check After Fixing 04401 Code

Inspect all the connections o2 sensor signal bank 2 sensor 2, biased / stuck lean
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

04401 Fault Code For Volkswagen Vehicles

The fault code 04401 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 04401 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

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