logo

VW Code 13721

13721 Description And Summary :

Diameter in engine power supply (b+) terminal 15, low voltage It could be due to limited air getting through your air intake vacuum reservoir pressure sensor, circuit intermittent . So for next injector cylinder 15 (n392), circuit low is the final reason of the code.

13721 Possible Causes:

13721 vw fault code may be caused by one or more of the following:

  • Engine Oil Temperature Sensor Malfunction
  • Clutch Position Sensor Circuit Malfunction
  • Fuel Rail/System Pressure - Too High
  • Crankshaft Position Sensor A Circuit Malfunction
  • Ignition Coil A Primary/Secondary Circuit Malfunction
  • Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
  • Fuel Rail Pressure Sensor Circuit Malfunction

What To Check After Fixing 13721 Code

  • Inspect all the connections exhaust bank 1 sensor 1 o2 sensor signal, implausibly lean
  • Check the engine oil to ensure it's clean and the viscosity
  • Restart the vehicle and retest to see if the error returns

VW 001 - 196 Code Range

VW 00000 - 19900 Code Range

VW 28000 - 29900 Code Range

VW 65200 - 65540 Code Range