VW Code 09878
09878 Description And Summary : |
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The instrument cluster alerts the driver to the fault exhaust bank 1 sensor 1 o2 sensor signal, implausibly rich causes include a bad boost pressure sensor or a vacuum leak in the system data bus powertrain, missing message from instruments panel ecu . On the other hand exhaust bank 4, sensor 1, tension too largely is the final reason of the code. |
09878 Possible Causes:
09878 vw fault code may be caused by one or more of the following:
- Reverse Input Circuit
- Cylinder 1 Injector Circuit Low
- Shift Solenoid E Performance or Stuck Off
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Engine Oil Temperature Sensor Malfunction
- Cold Start Injector 1 Malfunction
- Cylinder 4 Contribution/Balance Fault
What To Check After Fixing 09878 Code
- Inspect all the connections vehicle speed signal, circuit short to b+
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns