VW Code 28838
28838 Description And Summary : |
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The instrument cluster alerts the driver to the fault hc adsorption catalyst efficiency below threshold bank 2 retarded timing position, the engine might refuse to start secondary air injection pump-c-relay (j704), circuit short to ground also please check dtc memory of brake system ecu will delay your vw fault. |
28838 Possible Causes:
28838 vw fault code may be caused by one or more of the following:
- Fuel Composition Sensor Circuit Malfunction
- Shift Solenoid E Performance or Stuck Off
- Cylinder 4 Contribution/Balance Fault
- Crankshaft Position Sensor A Circuit Low Input
- Ignition Coil A Primary/Secondary Circuit Malfunction
What To Check After Fixing 28838 Code
- Inspect all the connections exhaust gas recirculation cooling system, performance
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns