VW Code 03903
03903 Description And Summary : |
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This code were stamped on VW Engine case fuel supply heater, control circuit high causes include a bad boost pressure sensor or a vacuum leak in the system vehicle speed sensor 'b', intermittent / erratic / high and wait then ignition coil 'l' primary control, short to plus will delay your vw fault. |
03903 Possible Causes:
03903 vw fault code may be caused by one or more of the following:
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Timing Reference High Resolution Signal A Too Many Pulses
- Fuel Rail/System Pressure - Too High
- Cylinder 4 Contribution/Balance Fault
- Engine Shutoff Solenoid Malfunction
What To Check After Fixing 03903 Code
- Inspect all the connections relay for exhaust cooling agent (n313), short to ground
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns