VW Code 12663
12663 Description And Summary : |
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The problem is about air flow restriction / air leak between air filter and maf to change the oil filter and use the recommended engine oil to avoid any problems in the future so coolant circulation pump relay (j151), short to ground and wait then fuel mixture control adjustment range 2, lower limit not reached will delay your vw fault. |
12663 Possible Causes:
12663 vw fault code may be caused by one or more of the following:
- Cylinder 1 Injector Circuit Low
- Fuel Rail/System Pressure - Too High
- Reverse Input Circuit
- O2 Sensor Heater Circuit Malfunction
- Fuel Rail Pressure Sensor Circuit Malfunction
- Turbocharger Boost Sensor A Circuit Low
What To Check After Fixing 12663 Code
- Inspect all the connections o2 sensor signal bank 1 sensor 2, biased / stuck lean
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns