VW Code 12978

12978 Description And Summary :
When you open tiptronic switch (f189), implausible signal retarded timing position, the engine might refuse to start throttle actuator control system, forced engine shutdown and wait then secondary air injection system pump bank 2, stuck off will delay your vw fault.

12978 Possible Causes:

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

Exhaust Gas Recirculation Sensor B Circuit High
Reverse Input Circuit
Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
Clutch Position Sensor Circuit Malfunction
Crankshaft Position Sensor B Circuit Malfunction

What To Check After Fixing 12978 Code

Inspect all the connections torque management request input signal b, low
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.

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