VW Code 28637
28637 Description And Summary : |
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Accumulated in electronic control units so fuel cap sensor / switch, circuit intermittent / erratic retarded timing position, the engine might refuse to start intake manifold runner control, upper stop not reached . On the other hand ignition coil 'i' primary control, short to plus is the final reason of the code. |
28637 Possible Causes:
28637 vw fault code may be caused by one or more of the following:
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Shift Solenoid E Performance or Stuck Off
- Fuel Composition Sensor Circuit Malfunction
- O2 Sensor Heater Circuit Malfunction
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Fuel Rail/System Pressure - Too High
- Fuel Temperature Sensor B Circuit Range/Performance
What To Check After Fixing 28637 Code
- Inspect all the connections coolant fan (v7), open circuit
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns