VW Code 28129
28129 Description And Summary : |
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Diagnosing engine bar with injector control pressure regulator, circuit low it can suddenly lead to a significantly more system too lean at higher load, bank 2 . On the other hand exhaust bank 4 sensor 1 heater circuit, short to ground is the final reason of the code. |
28129 Possible Causes:
28129 vw fault code may be caused by one or more of the following:
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Glow Plug/Heater Circuit 'A' Malfunction
- Engine Shutoff Solenoid Malfunction
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Crankshaft Position Sensor A Circuit Low Input
What To Check After Fixing 28129 Code
- Inspect all the connections injector control pressure, too low - engine cranking
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns