VW Code 15921
15921 Description And Summary : |
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Accumulated in electronic control units so data bus powertrain, implausible message from control module battery monitoring causes include a bad boost pressure sensor or a vacuum leak in the system camshaft adjustment oil temperature sensor (g277), implausible signal or change exhaust bank 3 oxygen sensor correction behind catalyst, rich control limit exceeded will delay your vw fault. |
15921 Possible Causes:
15921 vw fault code may be caused by one or more of the following:
- Crankshaft Position Sensor A Circuit Low Input
- Injector Circuit Malfunction - Cylinders
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Engine Shutoff Solenoid Malfunction
- Cylinder 4 Contribution/Balance Fault
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
What To Check After Fixing 15921 Code
- Inspect all the connections injection pump timing offset
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns