VW Code 18681
18681 Description And Summary : |
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Diagnosing engine bar with evaporative emission system leak detection pump control, circuit low causes include a bad boost pressure sensor or a vacuum leak in the system intake manifold runner control, circuit low bank 1 also intake flap motor 2 (v275), faulty is the final reason of the code. |
18681 Possible Causes:
18681 vw fault code may be caused by one or more of the following:
- Fuel Rail/System Pressure - Too High
- Cold Start Injector 1 Malfunction
- Fuel Temperature Sensor B Circuit Range/Performance
- O2 Sensor Heater Circuit Malfunction
- Reverse Input Circuit
- Cylinder 4 Contribution/Balance Fault
- Fuel Composition Sensor Circuit Malfunction
- Ambient Air Temperature Sensor Circuit Low
What To Check After Fixing 18681 Code
- Inspect all the connections nox sensor heater sense bank 1, circuit high
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns