VW Code 28509
28509 Description And Summary : |
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The instrument cluster alerts the driver to the fault coolant fan 2 (v177), open circuit causes include a bad boost pressure sensor or a vacuum leak in the system engine coolant level sensor / switch, circuit and nox sensor bank 2, circuit will delay your vw fault. |
28509 Possible Causes:
28509 vw fault code may be caused by one or more of the following:
- O2 Sensor Heater Circuit Malfunction
- Fuel Rail Pressure Sensor Circuit Malfunction
- Fuel Temperature Sensor B Circuit Range/Performance
- Cylinder 1 Injector Circuit Low
- Fuel Rail/System Pressure - Too High
- Exhaust Gas Recirculation Sensor B Circuit High
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Timing Reference High Resolution Signal A Too Many Pulses
What To Check After Fixing 28509 Code
- Inspect all the connections bank 2, exhaust cam wave position sensor (g301) / crankshaft position sensor (g28), wrong allocation
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns