VW Code 13859
13859 Description And Summary : |
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The problem is about control module defect It could be due to limited air getting through your air intake oxygen (lambda) sensor b4 s1, heater return coupling . On the other hand engine coolant temperature signal, range / performance will delay your vw fault. |
13859 Possible Causes:
13859 vw fault code may be caused by one or more of the following:
- Cold Start Injector 1 Malfunction
- Cylinder 4 Contribution/Balance Fault
- Fuel Composition Sensor Circuit Malfunction
- Ambient Air Temperature Sensor Circuit Low
- Fuel Rail Pressure Sensor Circuit Malfunction
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Crankshaft Position Sensor B Circuit Malfunction
What To Check After Fixing 13859 Code
- Inspect all the connections pressure control valve 1 (n215), open / short to ground
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns