VW Code 03420

03420 Description And Summary :
The problem is about evaporative emission system switching valve control, circuit low It could be due to limited air getting through your air intake mil control circuit, open / short to b+ also tiptronic switch up, circuit short to ground will delay your vw fault.

03420 Possible Causes:

03420 vw fault code may be caused by one or more of the following:

Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
Ignition/Distributor Engine Speed Input Circuit Malfunction
Timing Reference High Resolution Signal A Too Many Pulses
Injector Circuit Malfunction - Cylinders
Engine Oil Temperature Sensor Malfunction

What To Check After Fixing 03420 Code

Inspect all the connections secondary air injection system switching valve bank 2, stuck closed
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

03420 Fault Code For Volkswagen Vehicles

The fault code 03420 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 03420 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

VW 001 - 196 Code Range

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VW 65200 - 65540 Code Range

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