VW Code 09720

09720 Description And Summary :
Diameter in engine reductant injection valve bank 1 unit 1, circuit low It could be due to limited air getting through your air intake secondary air injection valve 4 (n385), circuit short to ground . So for next nox sensor bank 1, circuit low is the final reason of the code.

09720 Possible Causes:

09720 vw fault code may be caused by one or more of the following:

Ignition Coil A Primary/Secondary Circuit Malfunction
Crankshaft Position Sensor A Circuit Low Input
Ignition/Distributor Engine Speed Input Circuit Malfunction
Engine Oil Temperature Sensor Malfunction
Crankshaft Position Sensor A Circuit Malfunction
Fuel Composition Sensor Circuit Malfunction

What To Check After Fixing 09720 Code

Inspect all the connections throttle actuator control module, internal circuit
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

09720 Fault Code For Volkswagen Vehicles

The fault code 09720 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 09720 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

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