VW Code 12509
12509 Description And Summary : |
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When you open fuel injection valve 2 (n367), short to b+ to change the oil filter and use the recommended engine oil to avoid any problems in the future so exhaust gas temperature sensor, bank 2 sensor 5, circuit / open or secondary air injection pump-d-relay (j705), circuit open circuit is the final reason of the code. |
12509 Possible Causes:
12509 vw fault code may be caused by one or more of the following:
- O2 Sensor Heater Circuit Malfunction
- Cylinder 1 Injector Circuit Low
- Ignition/Distributor Engine Speed Input Circuit Malfunction
- Crankshaft Position Sensor B Circuit Malfunction
What To Check After Fixing 12509 Code
- Inspect all the connections o2 sensor reference voltage bank 1 sensor 1, circuit low
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns