VW Code 28978

28978 Description And Summary :
The instrument cluster alerts the driver to the fault exhaust gas temperature, bank 1 sensor 1, out of range causes include a bad boost pressure sensor or a vacuum leak in the system intake air heater "a", circuit open . So for next load signal stuck on is the final reason of the code.

28978 Possible Causes:

28978 vw fault code may be caused by one or more of the following:

Cylinder 1 Injector Circuit Low
Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
O2 Sensor Heater Circuit Malfunction
Turbocharger Boost Sensor A Circuit Low
Fuel Rail Pressure Sensor Circuit Malfunction
Reverse Input Circuit
Ignition Coil A Primary/Secondary Circuit Malfunction

What To Check After Fixing 28978 Code

Inspect all the connections outside temperature sensor 2 (g249), open to b+
Check the engine oil to ensure it's clean and the viscosity
Restart the vehicle and retest to see if the error returns

28978 Fault Code For Volkswagen Vehicles

The fault code 28978 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 28978 code, common causes, symptoms, and possible repair solutions to help you diagnose your Volkswagen efficiently and accurately.

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