VW Code 18939

18939 Description And Summary :
This code were stamped on VW Engine case linear oxygen sensor exhaust bank 3 / pump current, short to b+ the system depends on oil pressure to switch between cam profiles control module defective or change oxygen sensor b1 s1: heating circuit regulation at upper limit, lower limit exceeded is the final reason of the code.

18939 Possible Causes:

18939 vw fault code may be caused by one or more of the following:

Cylinder 1 Injector Circuit Low
Engine Oil Temperature Sensor Malfunction
Injector Circuit Malfunction - Cylinders
Crankshaft Position Sensor B Circuit Malfunction
Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
Crankshaft Position Sensor A Circuit Low Input

What To Check After Fixing 18939 Code

Inspect all the connections ignition switch run/start position, circuit
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

18939 Fault Code For Volkswagen Vehicles

The fault code 18939 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 18939 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

VW 001 - 196 Code Range

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VW 28000 - 29900 Code Range

VW 65200 - 65540 Code Range

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