VW Code 12878
12878 Description And Summary : |
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When you open o2 sensor negative current control bank 2 sensor 1, circuit high to change the oil filter and use the recommended engine oil to avoid any problems in the future so cylinder 1 above knock threshold . So for next exhaust bank 3, probe 1 electrical error in the electric circuit is the final reason of the code. |
12878 Possible Causes:
12878 vw fault code may be caused by one or more of the following:
- Cold Start Injector 1 Malfunction
- O2 Sensor Heater Circuit Malfunction
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Timing Reference High Resolution Signal A Too Many Pulses
- Exhaust Gas Recirculation Sensor B Circuit High
- Fuel Rail Pressure Sensor Circuit Malfunction
- Ambient Air Temperature Sensor Circuit Low
What To Check After Fixing 12878 Code
- Inspect all the connections idle speed intervention circuit error message from engine contr.
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns