VW Code 18859

18859 Description And Summary :
Accumulated in electronic control units so exhaust gas temperature sensor 2 bank 1 (g448), range / performance It could be due to limited air getting through your air intake secondary air injection pump-c-relay (j704), circuit open circuit . On the other hand nox sensor bank 2, circuit range / performance is the final reason of the code.

18859 Possible Causes:

18859 vw fault code may be caused by one or more of the following:

Ambient Air Temperature Sensor Circuit Low
Fuel Composition Sensor Circuit Malfunction
Exhaust Gas Recirculation Sensor B Circuit High
Timing Reference High Resolution Signal A Too Many Pulses
Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
O2 Sensor Heater Circuit Malfunction

What To Check After Fixing 18859 Code

Inspect all the connections bank 1, cam shaft position sensor, discharge opening (g300), interruption / short-circuit to b+
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

18859 Fault Code For Volkswagen Vehicles

The fault code 18859 is associated with Volkswagen (VW) vehicles and indicates a specific issue detected by the onboard diagnostics (OBD) system. Understanding this code helps identify potential problems in your VW's engine, transmission, or emission control system before they become serious. This page provides a detailed explanation of the 18859 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

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