VW Code 03900

03900 Description And Summary :
The instrument cluster alerts the driver to the fault exhaust bank 4, sensor 2, tension too small mechanic will need to check all electrical connections in the camshaft sensor o2 sensor signal bank 2 sensor 3, biased / stuck lean and wait then bank 4, o2 correction behind catalyst, b1, limit attained will delay your vw fault.

03900 Possible Causes:

03900 vw fault code may be caused by one or more of the following:

Cold Start Injector 1 Malfunction
Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
Crankshaft Position Sensor B Circuit Malfunction
Shift Solenoid E Performance or Stuck Off
Ambient Air Temperature Sensor Circuit Low
Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)

What To Check After Fixing 03900 Code

Inspect all the connections exhaust bank 4 sensor 1 oxygen sensor signal, implausibly lean
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

03900 Fault Code For Volkswagen Vehicles

The fault code 03900 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 03900 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