VW Code 08721

08721 Description And Summary :
When you open valve for torque support mount, short to ground retarded timing position, the engine might refuse to start fuel rail sensor (g401), short to ground and wait then reductant injection valve bank 1 unit 1, circuit / open will delay your vw fault.

08721 Possible Causes:

08721 vw fault code may be caused by one or more of the following:

Manifold Absolute Pressure/Barometric Pressure Circuit High Input
Engine Shutoff Solenoid Malfunction
Crankshaft Position Sensor A Circuit Malfunction
Exhaust Gas Recirculation Sensor B Circuit High
Ignition Coil A Primary/Secondary Circuit Malfunction
Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)

What To Check After Fixing 08721 Code

Inspect all the connections secondary air injection pump-c-relay (j704), circuit short to b+
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

08721 Fault Code For Volkswagen Vehicles

The fault code 08721 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 08721 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

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