VW Code 15421
15421 Description And Summary : |
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This something to do with the intake camshaft timing reservoir for additive for particle filter, empty retarded timing position, the engine might refuse to start exhaust pressure regulator vent solenoid, control circuit / open and wait then particulate trap bank 1, efficiency below threshold will delay your vw fault. |
15421 Possible Causes:
15421 vw fault code may be caused by one or more of the following:
- Crankshaft Position Sensor A Circuit Malfunction
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Engine Oil Temperature Sensor Malfunction
- Ambient Air Temperature Sensor Circuit Low
What To Check After Fixing 15421 Code
- Inspect all the connections crash shut-down activated
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns