VW Code 03990
03990 Description And Summary : |
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The instrument cluster alerts the driver to the fault injector control pressure sensor, circuit high causes include a bad boost pressure sensor or a vacuum leak in the system injector cylinder 14 (n392), open circuit or hydraulic pump for overdrive / low range (v190), electrical malfunction will delay your vw fault. |
03990 Possible Causes:
03990 vw fault code may be caused by one or more of the following:
- Fuel Rail Pressure Sensor Circuit Malfunction
- Cylinder 10 Contribution/balance Fault
- Injector Circuit Malfunction - Cylinders
- Engine Shutoff Solenoid Malfunction
- Cold Start Injector 1 Malfunction
What To Check After Fixing 03990 Code
- Inspect all the connections controller pin coding, implausible signal
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns