VW Code 12402

12402 Description And Summary :
Accumulated in electronic control units so o2 sensor signal bank 2 sensor 2, biased / stuck rich It could be due to limited air getting through your air intake nox trap, efficiency below threshold (bank 1) and wait then ignition coil cylinder 16, open circuit is the final reason of the code.

12402 Possible Causes:

12402 vw fault code may be caused by one or more of the following:

Cylinder 4 Contribution/Balance Fault
Turbocharger Boost Sensor A Circuit Low
Glow Plug/Heater Circuit 'A' Malfunction
Ignition/Distributor Engine Speed Input Circuit Malfunction
Injector Circuit Malfunction - Cylinders

What To Check After Fixing 12402 Code

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

12402 Fault Code For Volkswagen Vehicles

The fault code 12402 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 12402 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

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