VW Code 03998
03998 Description And Summary : |
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The problem is about a/c clutch relay, circuit short to ground run rough, or might suddenly stall at any given speed relay 2 for power supply (b+)terminal 30, range/performance you can see the relays for pump, fuel cooling (j445), interruption/short-circuit after mass is the final reason of the code. |
03998 Possible Causes:
03998 vw fault code may be caused by one or more of the following:
- Timing Reference High Resolution Signal A Too Many Pulses
- Fuel Rail Pressure Sensor Circuit Malfunction
- Reverse Input Circuit
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Crankshaft Position Sensor A Circuit Low Input
What To Check After Fixing 03998 Code
- Inspect all the connections data-bus powertrain, missing message from engine controller (ecu)
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns