VW Code 15203
15203 Description And Summary : |
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When you open nox sensor bank 1, circuit range / performance causes include a bad boost pressure sensor or a vacuum leak in the system radiator fan 2 (v177), difficulty of movement / blocked you can see the reversing light, circuit short to b+ will delay your vw fault. |
15203 Possible Causes:
15203 vw fault code may be caused by one or more of the following:
- Fuel Rail/System Pressure - Too High
- Timing Reference High Resolution Signal A Too Many Pulses
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- O2 Sensor Heater Circuit Malfunction
- Engine Oil Temperature Sensor Malfunction
What To Check After Fixing 15203 Code
- Inspect all the connections particulate trap bank 1, efficiency below threshold
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns