VW Code 16521
16521 Description And Summary : |
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When you open butterfly valve control unit 2 (j544), lower notice one does not reach the system depends on oil pressure to switch between cam profiles controller pin coding, implausible signal or fuel mixture control adjustment range 2, lower limit not reached will delay your vw fault. |
16521 Possible Causes:
16521 vw fault code may be caused by one or more of the following:
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Manifold Absolute Pressure/Barometric Pressure Circuit High Input
- Engine Shutoff Solenoid Malfunction
- O2 Sensor Heater Circuit Malfunction
- Glow Plug/Heater Circuit 'A' Malfunction
What To Check After Fixing 16521 Code
- Inspect all the connections exhaust gas temperature sensor, bank 2 sensor 4, circuit high
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns