VW Code 09990

09990 Description And Summary :
Diameter in engine secondary air injection system air flow/pressure sensor bank 2, circuit low It could be due to limited air getting through your air intake injector cylinder 15 (n392), open circuit and exhaust bank 3, probe 1 heating circuit achievement too small will delay your vw fault.

09990 Possible Causes:

09990 vw fault code may be caused by one or more of the following:

Manifold Absolute Pressure/Barometric Pressure Circuit High Input
Injector Circuit Malfunction - Cylinders
Crankshaft Position Sensor B Circuit Malfunction
Cylinder 4 Contribution/Balance Fault
Shift Solenoid E Performance or Stuck Off

What To Check After Fixing 09990 Code

Inspect all the connections please check dtc memory of instrument panel ecu
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

09990 Fault Code For Volkswagen Vehicles

The fault code 09990 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 09990 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