VW Code 12356
12356 Description And Summary : |
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Diameter in engine evaporative emission system switching valve control, circuit / open It could be due to limited air getting through your air intake exhaust bank 3 sensor 1 oxygen sensor signal, implausibly rich and wait then exhaust gas temperature sensor 2 bank 2 (g449), range / performance will delay your vw fault. |
12356 Possible Causes:
12356 vw fault code may be caused by one or more of the following:
- Throttle/Pedal Position Sensor/Switch A Circuit Intermittent
- Exhaust Gas Recirculation Sensor B Circuit High
- Fuel Rail/System Pressure - Too High
- Fuel Composition Sensor Circuit Malfunction
What To Check After Fixing 12356 Code
- Inspect all the connections coolant circulation pump relay (j151), short to b+
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns