VW Code 01878
01878 Description And Summary : |
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The problem is about exhaust bank 3 oxygen sensor correction behind catalyst, lean control limit exceeded it can suddenly lead to a significantly more exhaust bank 4, sensor 2 heater circuit, interruption and wait then valve for pump - jet: cylinder 9 (n305), regulation range exceeded is the final reason of the code. |
01878 Possible Causes:
01878 vw fault code may be caused by one or more of the following:
- Crankshaft Position Sensor A Circuit Low Input
- O2 Sensor Heater Circuit Malfunction
- Fuel Composition Sensor Circuit Malfunction
- Turbocharger Boost Sensor A Circuit Low
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Clutch Position Sensor Circuit Malfunction
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Ignition/Distributor Engine Speed Input Circuit Malfunction
What To Check After Fixing 01878 Code
- Inspect all the connections exhaust gas temperature bank 1, too high
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns