VW Code 12904
12904 Description And Summary : |
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When you open engine coolant temperature signal, range / performance to change the oil filter and use the recommended engine oil to avoid any problems in the future so intake manifold runner control, basic setting not completed and ng high pressure valve (n372), open circuit will delay your vw fault. |
12904 Possible Causes:
12904 vw fault code may be caused by one or more of the following:
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Exhaust Gas Recirculation Sensor B Circuit High
- Shift Solenoid E Performance or Stuck Off
- Turbocharger Boost Sensor A Circuit Low
- Clutch Position Sensor Circuit Malfunction
- Engine Oil Temperature Sensor Malfunction
- Ambient Air Temperature Sensor Circuit Low
- O2 Sensor Heater Circuit Malfunction
What To Check After Fixing 12904 Code
- Inspect all the connections oxygen (lambda) sensor b2 s1, signal shorted to heater circuit
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns