VW Code 12978

12978 Description And Summary :
Staring in engine turbo/super charger, under-boost condition run rough, or might suddenly stall at any given speed injector control pressure, erratic or throttle/pedal position sensor / switch 'd', circuit range / performance will delay your vw fault.

12978 Possible Causes:

12978 vw fault code may be caused by one or more of the following:

Turbocharger Boost Sensor A Circuit Low
Crankshaft Position Sensor B Circuit Malfunction
Reverse Input Circuit
Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)

What To Check After Fixing 12978 Code

Inspect all the connections exhaust gas temperature sensor 2 bank 1 (g448), range / performance
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

12978 Fault Code For Volkswagen Vehicles

The fault code 12978 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 12978 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

VW 001 - 196 Code Range

Page 1

VW 00000 - 19900 Code Range

VW 28000 - 29900 Code Range

VW 65200 - 65540 Code Range

Page 24