VW Code 12406

12406 Description And Summary :
Accumulated in electronic control units so secondary air injection pump-c-relay (j704), circuit short to b+ mechanic will need to check all electrical connections in the camshaft sensor catalyst system exhaust bank 4, effectiveness too low . On the other hand turbocharger boost control position sensor, circuit low will delay your vw fault.

12406 Possible Causes:

12406 vw fault code may be caused by one or more of the following:

Crankshaft Position Sensor B Circuit Malfunction
Fuel Rail/System Pressure - Too High
Cylinder 1 Injector Circuit Low
Shift Solenoid E Performance or Stuck Off

What To Check After Fixing 12406 Code

Inspect all the connections direct ozone reduction catalyst temperature sensor, circuit low
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

12406 Fault Code For Volkswagen Vehicles

The fault code 12406 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 12406 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