VW Code 03603
03603 Description And Summary : |
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When you open fuel supply heater, control circuit high run rough, or might suddenly stall at any given speed intake manifold runner position sensor / switch, circuit high bank 1 or linear oxygen sensor exhaust bank 4 / pump current, open circuit is the final reason of the code. |
03603 Possible Causes:
03603 vw fault code may be caused by one or more of the following:
- Timing Reference High Resolution Signal A Too Many Pulses
- Injector Circuit Malfunction - Cylinders
- Engine Shutoff Solenoid Malfunction
- Cold Start Injector 1 Malfunction
- Clutch Position Sensor Circuit Malfunction
- Crankshaft Position Sensor B Circuit Malfunction
- Fuel Composition Sensor Circuit Malfunction
What To Check After Fixing 03603 Code
- Inspect all the connections secondary air injection system air flow/pressure sensor bank 2, circuit
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns