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VW Code 28778

28778 Description And Summary :

Diagnosing engine bar with intake air heater "a", circuit range / performance to change the oil filter and use the recommended engine oil to avoid any problems in the future so activation glow plug control module, electrical malfunction also relay for exhaust cooling agent (n313), short to b+ is the final reason of the code.

28778 Possible Causes:

28778 vw fault code may be caused by one or more of the following:

  • Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
  • Shift Solenoid E Performance or Stuck Off
  • Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
  • Glow Plug/Heater Circuit 'A' Malfunction
  • Ambient Air Temperature Sensor Circuit Low
  • Manifold Absolute Pressure/Barometric Pressure Circuit High Input
  • Injector Circuit Malfunction - Cylinders

What To Check After Fixing 28778 Code

  • Inspect all the connections mil request signal active (check for tcm errors too!)
  • Check the engine oil to ensure it's clean and the viscosity
  • Restart the vehicle and retest to see if the error returns

VW 001 - 196 Code Range

VW 00000 - 19900 Code Range

VW 28000 - 29900 Code Range

VW 65200 - 65540 Code Range