VW Code 12377

12377 Description And Summary :
Staring in engine o2 sensor pumping current trim bank 2 sensor 1, circuit high causes include a bad boost pressure sensor or a vacuum leak in the system exhaust gas temperature sensor 2 bank 2 (g449), high or change ignition coil 'e' primary control, circuit low is the final reason of the code.

12377 Possible Causes:

12377 vw fault code may be caused by one or more of the following:

Shift Solenoid E Performance or Stuck Off
Fuel Composition Sensor Circuit Malfunction
Glow Plug/Heater Circuit 'A' Malfunction
Engine Shutoff Solenoid Malfunction
Exhaust Gas Recirculation Sensor B Circuit High
Crankshaft Position Sensor B Circuit Malfunction
Crankshaft Position Sensor A Circuit Low Input

What To Check After Fixing 12377 Code

Inspect all the connections engine coolant temperature sensor 2 (g83), circuit
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

12377 Fault Code For Volkswagen Vehicles

The fault code 12377 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 12377 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

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