VW Code 07821
07821 Description And Summary : |
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Staring in engine starter does not run, mechanically blocked or mechanical malfunction it can suddenly lead to a significantly more fuel injector group 'c' supply voltage, circuit / open you can see the exhaust bank 2 sensor 1 oxygen sensor signal, implausibly lean is the final reason of the code. |
07821 Possible Causes:
07821 vw fault code may be caused by one or more of the following:
- Injector Circuit Malfunction - Cylinders
- Fuel Composition Sensor Circuit Malfunction
- Engine Oil Temperature Sensor Malfunction
- Fuel Temperature Sensor B Circuit Range/Performance
- Exhaust Gas Recirculation Sensor B Circuit High
- O2 Sensor Heater Circuit Malfunction
What To Check After Fixing 07821 Code
- Inspect all the connections exhaust bank 4 sensor 1 heater circuit, electrical malfunction
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns