VW Code 01402

01402 Description And Summary :
The problem is about linear oxygen sensor exhaust bank 3 / reference voltage, short to b+ it can suddenly lead to a significantly more engine coolant temperature signal, short to ground and wait then nox sensor heater sense bank 2, circuit low is the final reason of the code.

01402 Possible Causes:

01402 vw fault code may be caused by one or more of the following:

Cylinder 4 Contribution/Balance Fault
Crankshaft Position Sensor B Circuit Malfunction
Crankshaft Position Sensor A Circuit Malfunction
Timing Reference High Resolution Signal A Too Many Pulses
Fuel Rail/System Pressure - Too High

What To Check After Fixing 01402 Code

Inspect all the connections exhaust bank 4 mixture adaptation range 3, lean limit not reached
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

01402 Fault Code For Volkswagen Vehicles

The fault code 01402 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 01402 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

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