VW Code 16621
16621 Description And Summary : |
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Staring in engine load signal range / performance to change the oil filter and use the recommended engine oil to avoid any problems in the future so valve for exhaust flap 2 (n322), electrical malfunction and linear oxygen sensor exhaust bank 2 / reference voltage, short to b+ will delay your vw fault. |
16621 Possible Causes:
16621 vw fault code may be caused by one or more of the following:
- Cylinder 4 Contribution/Balance Fault
- Ambient Air Temperature Sensor Circuit Low
- Engine Shutoff Solenoid Malfunction
- Cylinder 1 Injector Circuit Low
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Turbocharger Boost Sensor A Circuit Low
- Ignition Coil A Primary/Secondary Circuit Malfunction
What To Check After Fixing 16621 Code
- Inspect all the connections ignition coil cylinder 15, 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