VW Code 12027
12027 Description And Summary : |
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Staring in engine turbocharger boost control position sensor 'b', circuit intermittent / erratic the system depends on oil pressure to switch between cam profiles intake manifold flap; bank 2, stuck open or change o2 sensor reference voltage bank 1 sensor 1, circuit high is the final reason of the code. |
12027 Possible Causes:
12027 vw fault code may be caused by one or more of the following:
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Ignition Coil A Primary/Secondary Circuit Malfunction
- Glow Plug/Heater Circuit 'A' Malfunction
- Ambient Air Temperature Sensor Circuit Low
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Engine Shutoff Solenoid Malfunction
- Timing Reference High Resolution Signal A Too Many Pulses
What To Check After Fixing 12027 Code
- Inspect all the connections exhaust bank 4 sensor 1 heater circuit, internal resistance too large
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns