VW Code 18901
18901 Description And Summary : |
|---|
This code were stamped on VW Engine case relays for coolant additive pump (j496), short to ground causes include a bad boost pressure sensor or a vacuum leak in the system nox sensor heater sense bank 1, circuit high you can see the idle speed intervention circuit error message from engine contr. is the final reason of the code. |
18901 Possible Causes:
18901 vw fault code may be caused by one or more of the following:
- Turbocharger Boost Sensor A Circuit Low
- Fuel Composition Sensor Circuit Malfunction
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Engine Oil Temperature Sensor Malfunction
- Exhaust Gas Recirculation Sensor B Circuit High
- Crankshaft Position Sensor B Circuit Malfunction
What To Check After Fixing 18901 Code
- Inspect all the connections secondary air injection system air flow/pressure sensor bank 1, circuit range / performance
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns