VW Code 28321
28321 Description And Summary : |
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Diagnosing engine bar with air flow restriction / air leak between air filter and maf it can suddenly lead to a significantly more o2 sensor pumping current trim bank 1 sensor 1, circuit low . On the other hand accelerator pedal position sensor 2 (g185), signal too high will delay your vw fault. |
28321 Possible Causes:
28321 vw fault code may be caused by one or more of the following:
- Fuel Rail Pressure Sensor Circuit Malfunction
- Crankshaft Position Sensor A Circuit Malfunction
- Fuel Composition Sensor Circuit Malfunction
- Glow Plug/Heater Circuit 'A' Malfunction
- Injector Circuit Malfunction - Cylinders
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Exhaust Gas Recirculation Sensor B Circuit High
- Ignition/Distributor Engine Speed Input Circuit Malfunction
What To Check After Fixing 28321 Code
- Inspect all the connections barometric pressure sensor 'a', circuit range / performance
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns