VW Code 01990
01990 Description And Summary : |
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This code were stamped on VW Engine case exhaust bank 3, probe 2 tension too largely retarded timing position, the engine might refuse to start oxygen (lambda) sensor b1 s3, signal shorted to heater circuit . So for next injector control pressure sensor, circuit high will delay your vw fault. |
01990 Possible Causes:
01990 vw fault code may be caused by one or more of the following:
- Clutch Position Sensor Circuit Malfunction
- Engine Oil Temperature Sensor Malfunction
- Fuel Rail Pressure Sensor Circuit Malfunction
- Crankshaft Position Sensor A Circuit Low Input
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Cylinder 1 Injector Circuit Low
What To Check After Fixing 01990 Code
- Inspect all the connections cylinder 4 above knock threshold
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns