VW Code 12405
12405 Description And Summary : |
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The instrument cluster alerts the driver to the fault data bus powertrain, missing message from control module level control to change the oil filter and use the recommended engine oil to avoid any problems in the future so fuel tank pressure (ftp) sensor (g400), short to b+ also vehicle speed sensor 'a' / 'b', correlation is the final reason of the code. |
12405 Possible Causes:
12405 vw fault code may be caused by one or more of the following:
- Injector Circuit Malfunction - Cylinders
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Engine Shutoff Solenoid Malfunction
- Crankshaft Position Sensor A Circuit Malfunction
- Fuel Composition Sensor Circuit Malfunction
- Turbocharger Boost Sensor A Circuit Low
- Shift/Timing Solenoid Malfunction/ 3-2 Shift Solenoid Circuit Electrical
What To Check After Fixing 12405 Code
- Inspect all the connections secondary air injection system air flow/pressure sensor bank 2, circuit intermittent / erratic
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns