VW Code 12420
12420 Description And Summary : |
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The problem is about coolant fan (v7), open circuit the system depends on oil pressure to switch between cam profiles givers 2 for intake air temperature (g299), signal too largely or change charging system, voltage high is the final reason of the code. |
12420 Possible Causes:
12420 vw fault code may be caused by one or more of the following:
- Cold Start Injector 1 Malfunction
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Exhaust Gas Recirculation Sensor B Circuit High
- Timing Reference High Resolution Signal A Too Many Pulses
- Fuel Composition Sensor Circuit Malfunction
What To Check After Fixing 12420 Code
- Inspect all the connections intake air temperature sensor 1/2 correlation
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns