VW Code 03721

03721 Description And Summary :
Accumulated in electronic control units so exhaust bank 2 sensor 1 oxygen sensor signal, voltage too low during deceleration the system depends on oil pressure to switch between cam profiles wheel speed signal 1, range / performance or o2 sensor pumping current trim bank 2 sensor 1, circuit / open is the final reason of the code.

03721 Possible Causes:

03721 vw fault code may be caused by one or more of the following:

Injector Circuit Malfunction - Cylinders
Fuel Rail Pressure Sensor Circuit Malfunction
Crankshaft Position Sensor A Circuit Low Input
Engine Shutoff Solenoid Malfunction

What To Check After Fixing 03721 Code

Inspect all the connections throttle/pedal position sensor 'a', maximum stop performance
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

03721 Fault Code For Volkswagen Vehicles

The fault code 03721 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 03721 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 00000 - 19900 Code Range

VW 28000 - 29900 Code Range

VW 65200 - 65540 Code Range

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