VW Code 12940

12940 Description And Summary :
Staring in engine linear oxygen sensor exhaust bank 2 / reference voltage, open circuit causes include a bad boost pressure sensor or a vacuum leak in the system secondary air injection pump-c-relay (j704), circuit open circuit you can see the secondary air injection pump-d-relay (j705), circuit open circuit is the final reason of the code.

12940 Possible Causes:

12940 vw fault code may be caused by one or more of the following:

Manifold Absolute Pressure/Barometric Pressure Circuit High Input
Crankshaft Position Sensor B Circuit Malfunction
Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
Clutch Position Sensor Circuit Malfunction
Shift Solenoid E Performance or Stuck Off
Engine Shutoff Solenoid Malfunction
Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
Fuel Rail/System Pressure - Too High

What To Check After Fixing 12940 Code

Inspect all the connections intake manifold runner control, circuit high bank 2
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

12940 Fault Code For Volkswagen Vehicles

The fault code 12940 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 12940 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

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