VW Code 06721

06721 Description And Summary :
The problem is about transmission coolant circuit relay, short to ground It could be due to limited air getting through your air intake park/neutral switch input circuit or change please check dtc memory of ecu number 2 is the final reason of the code.

06721 Possible Causes:

06721 vw fault code may be caused by one or more of the following:

Fuel Rail Pressure Sensor Circuit Malfunction
Ignition Coil A Primary/Secondary Circuit Malfunction
O2 Sensor Heater Circuit Malfunction
Turbocharger Boost Sensor A Circuit Low
Cylinder 1 Injector Circuit Low
Fuel Rail/System Pressure - Too High
Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)

What To Check After Fixing 06721 Code

Inspect all the connections injector cylinder 13 (n390), open circuit
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

06721 Fault Code For Volkswagen Vehicles

The fault code 06721 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 06721 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