VW Code 18973

18973 Description And Summary :
Staring in engine reductant injection valve bank 2 unit 1, circuit high causes include a bad boost pressure sensor or a vacuum leak in the system exhaust bank 4 sensor 1 heater circuit, short to ground or change linear oxygen sensor exhaust bank 4 / reference voltage, open circuit is the final reason of the code.

18973 Possible Causes:

18973 vw fault code may be caused by one or more of the following:

Timing Reference High Resolution Signal A Too Many Pulses
Cylinder 1 Injector Circuit Low
Injector Circuit Malfunction - Cylinders
Crankshaft Position Sensor B Circuit Malfunction
Reverse Input Circuit
Ambient Air Temperature Sensor Circuit Low
Fuel Rail/System Pressure - Too High

What To Check After Fixing 18973 Code

Inspect all the connections linear oxygen sensor exhaust bank 1, compensation wire pump current, open circuit
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

18973 Fault Code For Volkswagen Vehicles

The fault code 18973 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 18973 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

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