VW Code 28643
28643 Description And Summary : |
|---|
The problem is about secondary air injection pump-c-relay (j704), circuit electrical malfunction causes include a bad boost pressure sensor or a vacuum leak in the system throttle/pedal position sensor 'b', minimum stop performance you can see the evaporative emission system leak detection pump control, circuit high is the final reason of the code. |
28643 Possible Causes:
28643 vw fault code may be caused by one or more of the following:
- Exhaust Gas Recirculation Sensor B Circuit High
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Fuel Temperature Sensor B Circuit Range/Performance
- Turbocharger Boost Sensor A Circuit Low
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
What To Check After Fixing 28643 Code
- Inspect all the connections valve for exhaust flap 1 (n321), electrical malfunction
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns