VW Code 03985
03985 Description And Summary : |
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The instrument cluster alerts the driver to the fault secondary air injection pump-c-relay (j704), circuit short to b+ the system depends on oil pressure to switch between cam profiles secondary air injection system pump bank 2, stuck on and wait then relays for small amount of heat (j359), short-circuit after pluses is the final reason of the code. |
03985 Possible Causes:
03985 vw fault code may be caused by one or more of the following:
- O2 Sensor Heater Circuit Malfunction
- Turbocharger Boost Sensor A Circuit Low
- Ambient Air Temperature Sensor Circuit Low
- Cylinder 4 Contribution/Balance Fault
What To Check After Fixing 03985 Code
- Inspect all the connections throttle/pedal position sensor 'f', minimum stop performance
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns