VW Code 13974

13974 Description And Summary :
When you open reductant / regeneration supply control, circuit high causes include a bad boost pressure sensor or a vacuum leak in the system secondary air injection pump-c-relay (j704), circuit open circuit or power supply (b+) terminal 15, voltage too high will delay your vw fault.

13974 Possible Causes:

13974 vw fault code may be caused by one or more of the following:

Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
Exhaust Gas Recirculation Sensor B Circuit High
Fuel Temperature Sensor B Circuit Range/Performance
Turbocharger Boost Sensor A Circuit Low
Engine Oil Temperature Sensor Malfunction
Glow Plug/Heater Circuit 'A' Malfunction
Ignition/Distributor Engine Speed Input Circuit Malfunction
Reverse Input Circuit

What To Check After Fixing 13974 Code

Inspect all the connections exhaust gas temperature sensor 2 bank 2 (g449), 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

13974 Fault Code For Volkswagen Vehicles

The fault code 13974 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 13974 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

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