VW Code 12657
12657 Description And Summary : |
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Accumulated in electronic control units so injector control pressure sensor, circuit to change the oil filter and use the recommended engine oil to avoid any problems in the future so direct ozone reduction catalyst deterioration sensor, circuit . So for next exhaust gas recirculation cooling system, performance will delay your vw fault. |
12657 Possible Causes:
12657 vw fault code may be caused by one or more of the following:
- Exhaust Gas Recirculation Sensor B Circuit High
- Engine Oil Temperature Sensor Malfunction
- Injection Pump Fuel Metering Control 'A' High (Cam/Rotor/Injector)
- Injection lump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
- Engine Shutoff Solenoid Malfunction
What To Check After Fixing 12657 Code
- Inspect all the connections idle regulation lean operation: rpm too high
- Check the engine oil to ensure it's clean and the viscosity
- Restart the vehicle and retest to see if the error returns