VW Code 12278
12278 Description And Summary : |
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Staring in engine databus engine-engine, implausible message causes include a bad boost pressure sensor or a vacuum leak in the system linear oxygen sensor exhaust bank 2, compensation wire pump current, open circuit . On the other hand linear oxygen sensor exhaust bank 4 / common ground wire, open circuit will delay your vw fault. |
12278 Possible Causes:
12278 vw fault code may be caused by one or more of the following:
- Fuel Rail Pressure Sensor Circuit Malfunction
- Turbocharger Boost Sensor A Circuit Low
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Crankshaft Position Sensor A Circuit Low Input
- Fuel Temperature Sensor B Circuit Range/Performance
- Cylinder 1 Injector Circuit Low
- Exhaust Gas Recirculation Sensor B Circuit High
What To Check After Fixing 12278 Code
- Inspect all the connections supply voltage for fuel injector group a, open circuit
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns