VW Code 01621
01621 Description And Summary : |
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Diagnosing engine bar with valve for pump - jet: cylinder 7 (n303), electrical malfunction it can suddenly lead to a significantly more exhaust gas temperature sensor, bank 1 sensor 4, circuit low and data bus powertrain, implausible message of the a/c control module will delay your vw fault. |
01621 Possible Causes:
01621 vw fault code may be caused by one or more of the following:
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Cold Start Injector 1 Malfunction
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
- Injector Circuit Malfunction - Cylinders
- Fuel Temperature Sensor B Circuit Range/Performance
What To Check After Fixing 01621 Code
- Inspect all the connections fuel supply heater, control circuit low
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns